The Aurora Borealis (Northern Lights) is seen in the sky outside Murmansk, Russia October 28, 2019. REUTERS/Maxim Shemetov

The Aurora Borealis (Northern Lights) is seen in the sky outside Murmansk, Russia October 28, 2019. REUTERS/Maxim Shemetov

The Simme river flows down a waterfall, days ahead of federal elections, in Lenk, Switzerland October 14, 2019. Picture taken October 14, 2019 and with a long exposure. REUTERS/Denis Balibouse

The Wildstrubel mountain and the Plaine Morte glacier are pictured, days ahead federal elections, in Lenk, Switzerland October 14, 2019. Picture taken October 14, 2019. REUTERS/Denis Balibouse

A boat is seen during sunset in Boracay, Philippines October 26, 2018. REUTERS/Ronn Bautista

Larches are pictured in front of the Mont Gond on a warm autumn day near a lake in Derborence, Switzerland, October 25, 2018. REUTERS/Denis Balibouse

Larches are pictured on a warm autumn day near a lake in Derborence, Switzerland, October 25, 2018. REUTERS/Denis Balibouse

People enjoy a warm autumn day near a lake in Derborence, Switzerland, October 25, 2018. REUTERS/Denis Balibouse

People enjoy a warm autumn day near a lake in Derborence, Switzerland, October 25, 2018. REUTERS/Denis Balibouse

Larches are pictured in front of the Quille du Diable mountain on warm autumn day in Derborence, Switzerland, October 25, 2018. REUTERS/Denis Balibouse

The sun is pictured behind trees on warm autumn day in Derborence, Switzerland, October 25, 2018. REUTERS/Denis Balibouse

A refuge stands on the shore of Cejar lagoon on Atacama salt flat in the Atacama desert, Chile, August 15, 2018. REUTERS/Ivan Alvarado

Flamingo birds are seen at Chaxa lagoon on the Atacama salt flat in the Atacama desert, Chile, August 15, 2018. REUTERS/Ivan Alvarado

Part of Cejar lagoon is seen on the Atacama salt flat in the Atacama desert, Chile, August 15, 2018. REUTERS/Ivan Alvarado

A path is seen at Cejar lagoon on the Atacama salt flat in the Atacama desert, Chile, August 15, 2018. REUTERS/Ivan Alvarado

Sunset seen from the Peine area of the Atacama salt flat in the Atacama desert, Chile, August 15, 2018. REUTERS/Ivan Alvarado

Flamingo birds are seen at Chaxa lagoon on the Atacama salt flat in the Atacama desert, Chile, August 15, 2018. REUTERS/Ivan Alvarado

A sunset view of the Hong Kong-Zhuhai-Macau bridge off Lantau island in Hong Kong, China October 21, 2018, before its opening ceremony on October 23. Picture taken October 21, 2018. REUTERS/Bobby Yip

A sunset view of the Hong Kong-Zhuhai-Macau bridge off Lantau island in Hong Kong, China October 21, 2018, before its opening ceremony on October 23, 2018. Picture taken October 21, 2018. REUTERS/Bobby Yip

Cable cars move in front of the Hong Kong-Zhuhai-Macau bridge off Lantau island in Hong Kong, China October 21, 2018, before its opening ceremony on October 23, 2018. Picture taken October 21, 2018. REUTERS/Bobby Yip

A cyclist overlooks the Irish Sea from atop Killiney hill near Dublin, Ireland October 21, 2018. REUTERS/Alkis Konstantinidis

Autumnal colours are reflected in the lake in St James's Park, in central London, Britain October 21, 2018. REUTERS/Henry Nicholls

Autumnal colours are reflected in the lake in St James's Park, in central London, Britain October 21, 2018. REUTERS/Henry Nicholls

Autumnal colours are reflected in the lake in St James's Park, in central London, Britain October 21, 2018. REUTERS/Henry Nicholls

Autumnal colours are reflected in the lake in St James's Park, in central London, Britain October 21, 2018. REUTERS/Henry Nicholls

Autumnal colours are reflected in the lake in St James's Park, in central London, Britain October 21, 2018. REUTERS/Henry Nicholls

Autumnal colours are reflected in the lake in St James's Park, in central London, Britain October 21, 2018. REUTERS/Henry Nicholls

A fisherman stands at the shore of Lake Sylvensteinspeicher near Lenggries, Germany, October 21, 2018. REUTERS/Andreas Gebert

A man in a rowing boat passes by colorful trees at Lake Sylvensteinspeicher near Lenggries, Germany, October 21, 2018. REUTERS/Andreas Gebert

A man in a rowing boat passes by colorful trees at Lake Sylvensteinspeicher near Lenggries, Germany, October 21, 2018. REUTERS/Andreas Gebert

A fisherman stands at the shore of Lake Sylvensteinspeicher near Lenggries, Germany, October 21, 2018. REUTERS/Andreas Gebert

The sun shines through autumn foliage of a larch tree at Schlegeis reservoir near the alpine village of Ginzling, Austria October 21, 2018. REUTERS/Lisi Niesner

The sun shines through autumn foliage of a larch tree at Schlegeis reservoir near the alpine village of Ginzling, Austria October 21, 2018. REUTERS/Lisi Niesner

A woman sits on a swing bridge beyond Schlegeis reservoir on a sunny autumn day near the alpine village of Ginzling, Austria October 21, 2018. REUTERS/Lisi Niesner

A bird flies at sunrise in Cordemais, near Nantes, France, October 18, 2018. REUTERS/Stephane Mahe

Kites are seen above the Nyatapola temple during "Dashain", Hinduism's biggest religious festival in Bhaktapur, Nepal October 18, 2018. REUTERS/Navesh Chitrakar

A tourist uses a mobile phone in front of Valle de la Luna (Moon Valley) near San Pedro de Atacama in the Atacama desert, Chile, August 16, 2018. REUTERS/Ivan Alvarado SEARCH "MINE LITHIUM" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

People enjoy a warm autumn day at the Creux du Van in Val-de-Travers near Neuchatel, Switzerland, October 18, 2018. REUTERS/Denis Balibouse

People enjoy a warm autumn day at the Creux du Van in Val-de-Travers near Neuchatel, Switzerland, October 18, 2018. REUTERS/Denis Balibouse

People enjoy a warm autumn day at the Creux du Van in Val-de-Travers near Neuchatel, Switzerland, October 18, 2018. REUTERS/Denis Balibouse

People enjoy a warm autumn day at the Creux du Van in Val-de-Travers near Neuchatel, Switzerland, October 18, 2018. REUTERS/Denis Balibouse

People walk out to the edge of a cliff at Coliemore harbour in Dublin, Ireland October 14, 2018. REUTERS/Clodagh Kilcoyne

An aerial view shows the loops of the Mana River in the Siberian Taiga area outside Krasnoyarsk, Russia October 13, 2018. Picture October 13, 2018. REUTERS/Ilya Naymushin

An aerial view shows the loops of the Mana River in the Siberian Taiga area outside Krasnoyarsk, Russia October 13, 2018. Picture October 13, 2018. REUTERS/Ilya Naymushin

A boat sails along the Yenisei River past the Monk Rock during sunset outside Krasnoyarsk, Russia October 14, 2018. REUTERS/Ilya Naymushin

The sun shines on the Cervin (Matterhor) mountain and a cloud on an autumn morning in Val d'Anniviers, Switzerland, October 14, 2018. REUTERS/Denis Balibouse

A hut is pictured near a forest on an autumn morning in Val d'Anniviers, Switzerland, October 14, 2018. REUTERS/Denis Balibouse

A cable car connecting Zinal to Grimentz is pictured in front of fresh snow on an autumn morning in Val d'Anniviers, Switzerland, October 14, 2018. REUTERS/Denis Balibouse

A shadow of a family is seen on a beach cabin on the pebbled beach during sunset in Cayeux-sur-Mer, France, October 13, 2018. REUTERS/Pascal Rossignol

People enjoy sunset beside a beach cabin on the pebbled beach in Cayeux-sur-Mer, France, October 13, 2018. REUTERS/Pascal Rossignol

People enjoy a walk at sunset past beach cabin on the pebbled beach in Cayeux-sur-Mer, France, October 13, 2018. REUTERS/Pascal Rossignol

A woman enjoys a walk at sunset past beach cabin on the pebbled beach in Cayeux-sur-Mer, France, October 13, 2018. REUTERS/Pascal Rossignol

The Zinalrothorn mountain is pictured on a warm autumn day in Val d'Anniviers, Switzerland, October 13, 2018. REUTERS/Denis Balibouse

Autumn colors are pictured on trees on a warm afternoon day in Val d'Anniviers, Switzerland, October 13, 2018. REUTERS/Denis Balibouse

The Zinalrothorn, Ober Gabelhorn, Cervin (Matterhorn) and Dent Blanche mountains are pictrued on a warm autumn day in Val d'Anniviers, Switzerland, October 13, 2018. REUTERS/Denis Balibouse

A flock of starlings fills the dusk sky over Rome, Italy October 10, 2018. REUTERS/Tony Gentile

A flock of starlings fills the dusk sky over Rome, Italy October 10, 2018. REUTERS/Tony Gentile

A flock of starlings fills the dusk sky over Rome, Italy October 10, 2018. REUTERS/Tony Gentile

A flock of starlings fills the dusk sky over Rome, Italy October 10, 2018. REUTERS/Tony Gentile