Members of the Middle East Caving and Expeditionary Team and Oman Speleological Team load equipment on a Royal Air Force of Oman helicopter after exploration of Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, December 2, 2019. Picture taken December 2, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team prepares a meal at an underground camp while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 28, 2019. Picture taken November 28, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team organize equipment at an underground camp while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 28, 2019. Picture taken November 28, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team and a local Omani villager establish surface camp next to Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 27, 2019. Picture taken November 27, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team rests after clearing a helicopter landing zone after exploration of Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, December 1, 2019. Picture taken December 1, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team prepares a meal at an underground camp while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 28, 2019. Picture taken November 28, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team splashes water on his face after exploration of Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, December 2, 2019. Picture taken December 2, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team loads equipment on to a Royal Air Force of Oman helicopter after exploration of Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, December 2, 2019. Picture taken December 2, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team prepare a meal at an underground camp while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 29, 2019. Picture taken November 29, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team poses for a photograph after ascending from Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, December 1, 2019. Picture taken December 1, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team explores Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 29, 2019. Picture taken November 29, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team at the surface camp next to Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, December 1, 2019. Picture taken December 1, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team after exploration of Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, December 1, 2019. Picture taken December 1, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team installs anchors while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 29, 2019. Picture taken November 29, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team descends while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 28, 2019. Picture taken November 28, 2019. REUTERS/Christopher Pike TPX IMAGES OF THE DAY 

A member of the Middle East Caving and Expeditionary Team installs rope while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 28, 2019. Picture taken November 28, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team ascends after exploration of Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, December 1, 2019. Picture taken December 1, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team installs anchors while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 29, 2019. Picture taken November 29, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team explores Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 28, 2019. Picture taken November 28, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team sleeps at an underground camp while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 30, 2019. Picture taken November 30, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team explores Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 29, 2019. Picture taken November 29, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team installs an anchor while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 29, 2019. Picture taken November 29, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team at an underground camp while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 30, 2019. Picture taken November 30, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team explore Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 30, 2019. Picture taken November 30, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team descends while exploring Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 28, 2019. Picture taken November 28, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team haul equipment and supplies to Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 28, 2019. Picture taken November 28, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team and a local Omani villager deliver equipment and supplies to Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 27, 2019. Picture taken November 27, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team and a local Omani villager deliver equipment and supplies to Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 27, 2019. Picture taken November 27, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team and a local Omani villager deliver equipment and supplies to Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 27, 2019. Picture taken November 27, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team hikes with equipment and supplies on the way to Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 27, 2019. Picture taken November 27, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team hikes with equipment and supplies on the way to Birdwing cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 27, 2019. Picture taken November 27, 2019. REUTERS/Christopher Pike 

Members of the Middle East Caving and Expeditionary Team weigh equipment prior to exploration of Birdwing cave, the deepest in the Gulf, at the base of Jebel Kawr near Ibri, Oman, November 26, 2019. Picture taken November 26, 2019. REUTERS/Christopher Pike 

A member of the Middle East Caving and Expeditionary Team looks out of a Royal Air Force of Oman helicopter while being transported to Birdwing Cave, the deepest in the Gulf, on Jebel Kawr near Ibri, Oman, November 27, 2019. Picture taken November 27, 2019. REUTERS/Christopher Pike 

Living with a scarcity of water is becoming the norm for many Venezuelans. Families interviewed by Reuters say they have spent months without receiving any water from the tap after power blackouts cut off supply and pipes failed due to a lack of maintenance. Faced with uncertainty of when it might return, and whether it would be enough, they are conserving as much water as they can take from rivers or buy at shops. They are bathing, washing clothes and dishes, and cooking with just a few liters a day. From the poorest slums, to the wealthiest neighborhoods, the shortage of water cuts across Venezuelan society as families endure the country's deepest ever economic crisis. A 5 liter bottle costs about $2 at a Caracas supermarket, out of reach for many low-income people in Venezuela, where the monthly minimum wage is only around $6 each month. REUTERS/Carlos Jasso SEARCH "CONTRERAS WATER" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY. Matching text: VENEZUELA-POLITICS/WATER TPX IMAGES OF THE DAY 

A Herring March participant holds onto a rope while being towed by a boat through the deepest part of Puck Bay, Poland, August 19, 2017. Picture taken August 19, 2017. REUTERS/Jekaterina Saveljeva 

The Herring March participants struggle with the waves while being towed by a boat through the deepest part of Puck Bay, Poland, August 19, 2017. Picture taken August 19, 2017. REUTERS/Jekaterina Saveljeva 

People look at Hranice Abyss, which according to a team of Czech-Polish explorers is the world's deepest underwater cave, near Hranice, Czech Republic March 29, 2017. Picture taken March 29, 2017. REUTERS/David W Cerny 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive next to "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive next to "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive into "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive next to "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Waitress Valeryia Prusakova brings the dinner in a waterproof box to customers sitting inside "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, in Brussels, Belgium January 30, 2017. Picture taken on January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart have dinner while sitting inside "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart drink champagne while sitting inside "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart have dinner while sitting inside "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart have dinner while sitting inside "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive next to "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive next to "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive next to "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart drink champagne while sitting inside "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive into "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive next to "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Belgians Florence Lutje Spelberg and Nicolas Mouchart dive into "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, before enjoying a meal inside, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman 

Waitress Valeryia Prusakova brings the dinner in a waterproof box to customers sitting inside "The Pearl", a spheric dining room placed 5 metres underwater in the NEMO33 diving center, one of the world's deepest pools (33 metre/36 yards) built to train professional divers, in Brussels, Belgium January 30, 2017. Picture taken January 30, 2017 REUTERS/Yves Herman