Soot stains the hands of John Creighton, the founder of Wombat Care Bundanoon, after he looked for traces of wombats in a burned-out forest after wildfires outside the town of Bundanoon in New South Wales, Australia, January 22, 2020. REUTERS/Thomas Peter

People wait for the arrival of Saint Nicholas and his assistants called "Zwarte Piet" (Black Pete) and "Roetpiet" (Soot Pete) as they arrive by boat at the harbour of Scheveningen, Netherlands, November 16, 2019. REUTERS/Piroschka van de Wouw

Assistants of Saint Nicholas called "Zwarte Piet" (Black Pete) or "Roetpiet" (Soot Peter) arrive by boat at the harbour of Scheveningen, Netherlands, November 16, 2019. REUTERS/Piroschka van de Wouw

An assistant of Saint Nicholas called "Roetpiet" (Soot Pete) arrives by boat at the harbour of Scheveningen, Netherlands, November 16, 2019. REUTERS/Piroschka van de Wouw TPX IMAGES OF THE DAY

An assistant of Saint Nicholas called "Zwarte Piet" (Black Pete) or "Roetpiet" (Soot Pete) arrives by boat at the harbour of Scheveningen, Netherlands, November 16, 2019. REUTERS/Piroschka van de Wouw

An assistant of Saint Nicholas called "Zwarte Piet" (Black Pete) or "Roetpiet" (Soot Pete) arrives by boat at the harbour of Scheveningen, Netherlands, November 16, 2019. REUTERS/Piroschka van de Wouw

Assistants of Saint Nicholas called "Zwarte Piet" (Black Pete) or "Roetpiet" (Soot Pete) arrive by boat at the harbour of Scheveningen, Netherlands, November 16, 2019. REUTERS/Piroschka van de Wouw

Ainu tattooist Mai Hachiya makes soot with burning bark as she prepares to draw an Ainu tattoo on her hand at her apartment in Sapporo, Hokkaido Prefecture, northern Japan, July 3, 2019. Some Ainu worry the new museum complex is mostly meant to burnish Japan's international standing ahead of the Olympics. "I think it's possible it could end up becoming a theme park," said Hachiya. "People would come to see the dancing and other performances. It would be like a zoo." REUTERS/Kim Kyung-Hoon SEARCH "KYUNG-HOON AINU" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Britain Football Soccer - Everton v AFC Bournemouth - Premier League - Goodison Park - 4/2/17 Everton's Ademola Lookman soots at goal Reuters / Andrew Yates Livepic EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further details.

Soot covers the fuselage of an American Airlines jet at O'Hare International Airport in Chicago, Illinois, U.S.October 28, 2016. REUTERS/Jim Young

Soot covers the fuselage of an American Airlines jet at O'Hare International Airport in Chicago, Illinois, U.S.October 28, 2016. REUTERS/Jim Young TPX IMAGES OF THE DAY

Al Hansen, a Fort McMurray resident and firefighter, begins to wash the soot off his driveway with a hose as thousands of evacuees who fled a massive wildfire begin to trickle back to their homes in Fort McMurray, Alberta, Canada June 2, 2016. REUTERS/Topher Seguin

A reveller, dressed as a "Mascaritas", attends carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

A reveller, dressed as a "Diablos de Luzon" (Luzon Devils), walks through streets during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

A reveller, dressed as a "Diablos de Luzon" (Luzon Devil), poses during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

Revellers, dressed as "Diablos de Luzon" (Luzon Devils), and others dressed as "Mascaritas" pose during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

Revellers, dressed as "Diablos de Luzon" (Luzon Devils), walk through streets during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

Revellers, dressed as "Diablos de Luzon" (Luzon Devils), and others dressed as "Mascaritas" pose during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez TPX IMAGES OF THE DAY

A reveller dressed as a "Mascaritas" attends carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

Revellers, dressed as "Diablos de Luzon" (Luzon Devils), attend carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

A reveller (R), dressed as a "Diablos de Luzon" (Luzon Devils), talks with a person dressed in a costume during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

A reveller, dressed as "Diablos de Luzon" (Luzon Devils), poses during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

A reveller, dressed as "Diablos de Luzon" (Luzon Devils), poses during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

A reveller (R), dressed as "Diablos de Luzon" (Luzon Devils), stands next to a person dressed as a "Mascaritas" during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

A reveller (C), dressed as "Diablos de Luzon" (Luzon Devils), talks with people dressed as characters from the movie "Avatar" during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

Revellers, dressed as "Diablos de Luzon" (Luzon Devils), stand during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

A reveller, dressed as "Diablos de Luzon" (Luzon Devils), stands during carnival celebrations in the village of Luzon, Spain, February 6, 2016. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black-stained bull horns as they parade throughout the village with cowbells clanging around their waists to expel the evil spirits. To make their appearance even more fearsome, the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers' faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". These are characters dressed in traditional women's clothing with their faces covered with a white cloth. To the beat of traditional music, the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken February 6, 2016. REUTERS/Sergio Perez

Workmen clean soot from a Japanese-made steam train at a train depot in Changhua, Taiwan, January 13, 2016. REUTERS/Olivia Harris

Workmen clean soot from a Japanese-made steam train at a train depot in Changhua, Taiwan, January 13, 2016. REUTERS/Olivia Harris

Punai Bai, 75, a follower of Ramnami Samaj, who has tattooed the name of the Hindu god Ram on her entire body, sweeps outside her house at the village Gorba, in the eastern state of Chhattisgarh, India, November 16, 2015. Denied entry to temples and forced to use separate wells, low-caste Hindus in the eastern state of Chhattisgarh first tattooed their bodies and faces more than 100 years ago as an act of defiance and devotion. Ramnamis wrote the Hindu god Ram's name on their bodies as a message to higher-caste Indians that god was everywhere, regardless of a person's caste or social standing. While discrimination on class grounds has lessened and most young Ramnamis today avoid full-body tattoos, elderly devotees are still proud of the indelible message their bodies have carried for decades. Bai spent more than two weeks aged 18 having her body tattooed using dye made from mixing soot from a kerosene lamp with water. "God is for everybody, not just for one community," said Bai, who lives in a one-room house with her son, daughter-in law and two grandchildren. REUTERS/Adnan Abidi PICTURE 30 OF 31 - SEARCH "RAMNAMI" FOR ALL IMAGES

Punai Bai, 75, a follower of Ramnami Samaj, who has tattooed the name of the Hindu god Ram on her entire body, carries vegetables to cook inside her house in the village of Gorba, in the eastern state of Chhattisgarh, India, November 16, 2015. Bai spent more than two weeks aged 18 having her body tattooed using dye made from mixing soot from a kerosene lamp with water. Denied entry to temples and forced to use separate wells, low-caste Hindus in the eastern state of Chhattisgarh first tattooed their bodies and faces more than 100 years ago as an act of defiance and devotion. Ramnamis wrote the Hindu god Ram's name on their bodies as a message to higher-caste Indians that god was everywhere, regardless of a person's caste or social standing. While discrimination on class grounds has lessened and most young Ramnamis today avoid full-body tattoos, elderly devotees are still proud of the indelible message their bodies have carried for decades. "God is for everybody, not just for one community," said Bai, who lives in a one-room house with her son, daughter-in law and two grandchildren. REUTERS/Adnan Abidi PICTURE 19 OF 31 - SEARCH "RAMNAMI" FOR ALL IMAGES

Punai Bai, 75, a follower of Ramnami Samaj, who has tattooed the name of the Hindu god Ram on her entire body, poses for a picture outside her house in the village of Gorba, in the eastern state of Chhattisgarh, India, November 15, 2015. Denied entry to temples and forced to use separate wells, low-caste Hindus in the eastern state of Chhattisgarh first tattooed their bodies and faces more than 100 years ago as an act of defiance and devotion. Ramnamis wrote the Hindu god Ram's name on their bodies as a message to higher-caste Indians that god was everywhere, regardless of a person's caste or social standing. While discrimination on class grounds has lessened and most young Ramnamis today avoid full-body tattoos, elderly devotees are still proud of the indelible message their bodies have carried for decades. Bai spent more than two weeks aged 18 having her full body tattooed using dye made from mixing soot from a kerosene lamp with water. "God is for everybody, not just for one community," said Bai, who lives in a one-room house with her son, daughter-in law and two grandchildren. REUTERS/Adnan Abidi PICTURE 22 OF 31 - SEARCH "RAMNAMI" FOR ALL IMAGES

Punai Bai, 75, a follower of Ramnami Samaj, who has tattooed the name of the Hindu god Ram on her entire body, poses for a picture outside her house in the village of Gorba, in the eastern state of Chhattisgarh, India, November 15, 2015. Denied entry to temples and forced to use separate wells, low-caste Hindus in the eastern state of Chhattisgarh first tattooed their bodies and faces more than 100 years ago as an act of defiance and devotion. Ramnamis wrote the Hindu god Ram's name on their bodies as a message to higher-caste Indians that god was everywhere, regardless of a person's caste or social standing. While discrimination on class grounds has lessened and most young Ramnamis today avoid full-body tattoos, elderly devotees are still proud of the indelible message their bodies have carried for decades. Bai spent more than two weeks aged 18 having her full body tattooed using dye made from mixing soot from a kerosene lamp with water. "God is for everybody, not just for one community," said Bai, who lives in a one-room house with her son, daughter-in law and two grandchildren. REUTERS/Adnan Abidi PICTURE 10 OF 31 - SEARCH "RAMNAMI" FOR ALL IMAGES

Punai Bai, 75, a follower of Ramnami Samaj, who has tattooed the name of the Hindu god Ram on her full body, poses for a picture outside her house in the village of Gorba, in the eastern state of Chhattisgarh, India, November 15, 2015. Denied entry to temples and forced to use separate wells, low-caste Hindus in the eastern state of Chhattisgarh first tattooed their bodies and faces more than 100 years ago as an act of defiance and devotion. Ramnamis wrote the Hindu god Ram's name on their bodies as a message to higher-caste Indians that god was everywhere, regardless of a person's caste or social standing. While discrimination on class grounds has lessened and most young Ramnamis today avoid full-body tattoos, elderly devotees are still proud of the indelible message their bodies have carried for decades. Bai spent more than two weeks aged 18 having her full body tattooed using dye made from mixing soot from a kerosene lamp with water. "God is for everybody, not just for one community," said Bai, who lives in a one-room house with her son, daughter-in law and two grandchildren. REUTERS/Adnan Abidi PICTURE 11 OF 31 - SEARCH "RAMNAMI" FOR ALL IMAGES

Jake Vold of Ponoka, Alberta, rides the horse Waskasoo Soot in the Bareback event during the Calgary Stampede rodeo in Calgary, Alberta, July 11, 2015. REUTERS/Todd Korol TPX IMAGES OF THE DAY

A protester with his face marked with black soot, participates in demonstrations in Burundi's capital Bujumbura, May 6, 2015. Nearly 40,000 refugees have fled Burundi to neighbouring Rwanda, Tanzania and the Democratic Republic of the Congo in the last month, amid protests against President Pierre Nkurunziza's bid for a third term, the United Nations said on Wednesday. REUTERS/Jean Pierre Aime Harerimana

A protester, with his face marked with black soot, participates in demonstrations against the ruling CNDD-FDD party's decision to allow President Pierre Nkurunziza to run for a third five-year term in office, in Bujumbura, Burundi April 30, 2015. Tom Malinowski, U.S. assistant secretary of state for democracy, human rights and labour, told Nkurunziza on Thursday that the east African country risks boiling over if it stifles political opposition, as protests against the president entered a fifth day. The Burundi Red Cross said 15 protesters were injured after clashing with the police on Thursday. REUTERS/Thomas Mukoya

A protester marks his face with black soot during clashes with riot-policemen against the ruling CNDD-FDD party's decision to allow President Pierre Nkurunziza to run for a third five-year term in office, in Bujumbura, Burundi April 28, 2015. Burundi's government told diplomats on Tuesday to stay neutral and not side with protesters who accuse President Nkurunziza of violating the constitution by announcing he will seek a third term in office. REUTERS/Thomas Mukoya

Workers unload coal from a supply truck at a yard on the outskirts of the western Indian city of Ahmedabad April 15, 2015. Fewer power cuts are likely in India this summer after a surge in output at Coal India helped generators amass record stocks, a turnaround for Narendra Modi who had to battle a power crisis within months of becoming prime minister last May. Fast-track mine approvals, tighter production oversight and more flexibility in coal sales have helped power station stocks recover from a six-year low hit in October, vindicating Modi's pitch to voters as the state leader who brought round-the-clock power to industrial Gujarat. REUTERS/Amit Dave

A reveller covers her face in soot and oil as he prepares to become a "Diablo de Luzon" (Luzon Devil) during carnival celebrations in the village of Luzon February 14, 2015. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY)

Revellers, dressed as "Mascaritas", stand during carnival celebrations in the village of Luzon February 14, 2015. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY TPX IMAGES OF THE DAY)

A reveller, dressed as "Diablos de Luzon" (Luzon Devils), stands during carnival celebrations in the village of Luzon February 14, 2015. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY)

A reveller (L), dressed as "Diablos de Luzon" (Luzon Devils), stands next to other revellers dressed as a nun and a priest (C) during carnival celebrations in the village of Luzon February 14, 2015. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY)

A reveller, dressed as "Diablos de Luzon" (Luzon Devils), walks through the village of Luzon during carnival celebrations February 14, 2015. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY)

A reveller, dressed as "Diablos de Luzon" (Luzon Devils), walks through the village of Luzon during carnival celebrations February 14, 2015. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY)

A reveller, dressed as "Diablos de Luzon" (Luzon Devils), walks through the village during carnival celebrations in the village of Luzon February 14, 2015. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY)

A reveller dressed as a "Diablo de Luzon" (L) (Luzon Devil) sits next to others dressed as Mascaritas" during carnival celebrations in Luzon February 14, 2015. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY)

A woman reacts upon seeing a "Diablo de Luzon" (Luzon Devil) outside her window during carnival celebrations in Luzon February 14, 2015. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. REUTERS/Sergio Perez (SPAIN - Tags: SOCIETY)

A man rinses soot from his face at the scene of a gas pipeline explosion near Nigeria's commercial capital Lagos in this December 26, 2006 file photo. Up to 500 people were burned alive when fuel from a vandalised pipeline exploded in Nigeria's largest city. Hundreds of residents of the Abule Egba district went to scoop fuel using plastic containers after thieves punctured the underground pipeline overnight to siphon fuel into a road tanker, locals said. REUTERS/Akintunde Akinleye/Files (NIGERIA - Tags: BUSINESS COMMODITIES DISASTER POLITICS ENERGY SOCIETY TPX IMAGES OF THE DAY)

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A doorway of a house is covered in soot from a fire, following an arson attack, in the municipality of Vorra near the northern Bavarian city of Nueremberg December 12, 2014. Three houses which were planned to be used for asylum seekers from early 2015 onwards, were set on fire and scrawled with Nazi symbols last night. The graffiti reads "No asylum seekers in Vorra". REUTERS/Michael Dalder (GERMANY - Tags: CRIME LAW SOCIETY IMMIGRATION)

Volunteers and workers clear soot from the site where a police vehicle was set ablaze in Ferguson, Missouri November 25, 2014. The St. Louis area braced for another day of protests on Tuesday after a grand jury cleared a white police officer in the fatal August shooting of an unarmed black teenager, sparking a night of violent and racially charged rioting. About a dozen buildings in suburban Ferguson, Missouri, burned overnight and police fired tear gas and flash-bang canisters at protesters, said St. Louis County Police Chief Jon Belmar. Sixty-one people were arrested, police said. REUTERS/Adrees Latif (UNITED STATES - Tags: CRIME LAW CIVIL UNREST)

A labourer takes a break at a coal dump site outside Mazar-i-Sharif, November 6, 2014. Picture taken on November 6, 2014. REUTERS/Anil Usyan (AFGHANISTAN - Tags: SOCIETY BUSINESS EMPLOYMENT COMMODITIES HEALTH TPX IMAGES OF THE DAY)

Trapped coal miners leave after they were rescued at the Raspotocje coal mine in Zenica September 5, 2014. Five Bosnian miners were confirmed dead on Friday, a day after an earthquake triggered a collapse at the mine, as emergency teams helped 29 others to the surface. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER BUSINESS EMPLOYMENT ENVIRONMENT TPX IMAGES OF THE DAY)

Soot surrounds a fire chimney in a home being auctioned during a home tour in the Boston Edison neighborhood of Detroit, Michigan May 17, 2014. The city of Detroit and the Detroit Land Bank are auctioning off homes throughout the city to try and aid communities with abandoned homes. One home will be auctioned off per day with an opening bid of $1,000. REUTERS/Joshua Lott (UNITED STATES - Tags: REAL ESTATE BUSINESS SOCIETY)

A reveller dressed as a "Diablo de Luzon" (Luzon Devil) smokes a cigarette during carnival celebrations in the Spanish village of Luzon March 1, 2014. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken March 1, 2014. REUTERS/Susana Vera (SPAIN - Tags: SOCIETY)

Carnival revellers and "Diablos de Luzon" (Luzon Devils) parade during carnival celebrations in the Spanish village of Luzon March 1, 2014. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken March 1, 2014. REUTERS/Susana Vera (SPAIN - Tags: SOCIETY)

A reveller gets his face covered in soot and oil as he prepares to become a "Diablo de Luzon" (Luzon Devil) during carnival celebrations in the Spanish village of Luzon March 1, 2014. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken March 1, 2014. REUTERS/Susana Vera (SPAIN - Tags: SOCIETY)

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A boy gets his face stained by a "Diablo de Luzon" (Luzon Devil) during carnival celebrations in the Spanish village of Luzon March 1, 2014. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken March 1, 2014. REUTERS/Susana Vera (SPAIN - Tags: SOCIETY)

A musician plays traditional tunes as "Diablos de Luzon" (Luzon Devils) parade during carnival celebrations in the Spanish village of Luzon March 1, 2014. The "Diablos" cover themselves in a mixture of soot and oil and adorn their heads with black stained bull horns as they parade throughout the village with cowbells clanging around their waist to expel the evil spirits. To make their appearance even more fearsome the devils often carry fake teeth made out of raw potatoes. They dance around Luzon and smear their black grease on revellers faces. The only people free from the attack of the "Diablos" are those who dress up as "Mascaritas". They are characters dressed in traditional women clothing with their faces covered with a white cloth. To the beat of traditional music the "Diablos" and the "Mascaritas" parade throughout the village in the afternoon in this carnival tradition that is thought to have pre-Christian origins. Picture taken March 1, 2014. REUTERS/Susana Vera (SPAIN - Tags: SOCIETY)