A bird dries its feathers on top of a tree as storm clouds gather on a wet day in Colombo, Sri Lanka November 21, 2016.

Dinuka Liyanawatte/Reuters

A bird dries its feathers on top of a tree as storm clouds gather on a wet day in Colombo, Sri Lanka. Photo Dinuka Liyanawatte/Reuters 

Art handlers Lorna Cumming-Bruce (left) and Sarah Gubbins at Bonhams in London with paintings by John Hoyland, Harvest (left) estimated at £30-50,000 and New Born Sun (rising) estimated at £25-35,000 which will be auctioned at the Bonhams Modern British and Irish Art Sale on November 23rd in London. PRESS ASSOCIATION Photo. Picture date: Monday November 21, 2016. Photo credit should read: Philip Toscano/PA Wire

Philip Toscano/PA

Art handlers Lorna Cumming-Bruce and Sarah Gubbins at Bonhams in London with paintings by John Hoyland, Harvest estimated at £30-50,000 and New Born Sun estimated at £25-35,000 which will be auctioned at the Bonhams Modern British and Irish Art Sale on Wednesday in London.

A vendor reads newspaper as he waits for customers at a wholesale onion market in Kolkata, India, November 21, 2016. REUTERS/Rupak De Chowdhuri

Rupak De Chowdhuri/Reuters

A vendor reads newspaper as he waits for customers at a wholesale onion market in Kolkata, India. Photo Rupak De Chowdhuri/Reuters 

 Blackened sheep graze as oil wells, set ablaze by retreating Islamic State (IS) jihadists, burn in the background, in the town of Qayyarah, some 70 km south of Mosul on November 20, 2016. Locals told AFP that they face a range of health issues including breathing difficulties, and sheperds said they could not sell their livestock as the sheep's fleece was blackened by smoke. / AFP PHOTO / Odd ANDERSENODD ANDERSEN/AFP/Getty Images

Odd Andersen/AFP/Getty

Blackened sheep graze as oil wells, set ablaze by retreating Islamic State jihadists, burn in the background, in the town of Qayyarah, Iraq. Photo Odd Andersen/AFP/Getty 

Matus, a seven-year-old Slovak boy, wears a Soviet military hat as he stands by remains of the border fences from the former 'Iron curtain' between Slovakia and Austria on November 20,2016 near Bratislava, Slovakia.  The bridge was symbolically closed for 3 days to remeber victims who lost their lives trying to escape the communist regime. Slovaks and Czechs commemorated on 17 of November 26th anniversary of the Velvet revolution. / AFP PHOTO / JOE KLAMARJOE KLAMAR/AFP/Getty Images

Joe Klamar/AFP/Getty

Matus, a seven-year-old Slovak boy, wears a Soviet military hat as he stands by remains of the border fences from the former ‘Iron curtain’ between Slovakia and Austria near Bratislava, Slovakia. Photo Joe Klamar/AFP/Getty

Walkers in Hyde Park, London brave the rain as Storm Angus continues to sweep across the UK. PRESS ASSOCIATION Photo. Picture date: Monday November 21, 2016. See PA story WEATHER Rain. Photo credit should read: Victoria Jones/PA Wire

Victoria Jone/PA

Walkers in Hyde Park, London brave the rain as Storm Angus continues to sweep across the UK. Photo Victoria Jone/PA

An Iraqi displaced boy (L) wears a mask depicting Korean pop star Park Jae-sang as he stands with a friend at Jadaa refugees camp near Qayyarah city, some 40 km southern Mosul, Iraq, 17 November 2016. According to a local official in Jadaa camp, the camp which was opened after the beginning of the military operation to liberation of Mosul city, is currently hosting around ten thousand people who fled from many villages near Mosul due to the fighting between the Iraqi forces and Islamic State (IS) group.  EPA/AHMED JALIL

Ahmed Jalil/EPA

An Iraqi displaced boy wears a mask depicting Korean pop star Park Jae-sang as he stands with a friend at Jadaa refugees camp near Qayyarah city. Photo Ahmed Jalil/EPA 

U.S. President Barack Obama is welcomed by German Chancellor Angela Merkel upon his arrival at the chancellery in Berlin, Germany, November 17, 2016.      REUTERS/Fabrizio Bensch  - RTX2U4LR

Fabrizio Bensch/Reuters

U.S. President Barack Obama is welcomed by German Chancellor Angela Merkel upon his arrival at the chancellery in Berlin, Germany. Photo Fabrizio Bensch/Reuters 

Robot inventor Wu Yulu sits on a rickshaw driven by a robot which he invented in his village in rural Beijing's Tongzhou district, China, 17 November 2016. The 54-year-old Chinese farmer living in rural Beijing's Tongzhou district invented 63 robots in the past 30 years. Wu, who only received primary school education, plans to give up the agricultural work for his robot products. He regularly participates in exhibitions, transfers patent rights and teaches at the university to earn money.  EPA/WU HONG

Wu Hong/EPA

Robot inventor Wu Yulu sits on a rickshaw driven by a robot which he invented in his village in rural Beijing’s Tongzhou district, China. The 54-year-old Chinese farmer has invented 63 robots in the past 30 years. Photo Wu Hong/EPA

Three Palestinian women sit on a beachfront as a wave comes rushing by in Gaza City on November 17, 2016. / AFP PHOTO / MOHAMMED ABEDMOHAMMED ABED/AFP/Getty Images

Mohammed Abed/AFP/Getty

Three Palestinian women sit on a beachfront as a wave comes rushing by in Gaza City. Photo Mohammed Abed/AFP/Getty 

A girl stands next to a monument inside the Athens' Polytechnic school, on the 43rd anniversary of a 1973 student uprising against the then military ruling junta in Athens, Greece, November 17, 2016. REUTERS/Alkis Konstantinidis     TPX IMAGES OF THE DAY

Alkis Konstantinidis/Reuters

A girl stands next to a monument inside the Athens’ Polytechnic school, on the 43rd anniversary of a 1973 student uprising against the then military ruling junta in Athens, Greece. Photo Alkis Konstantinidis/Reuters 

 An Indian cyclist passes a mural depicting Catholic nun Mother Teresa, in Bangalore, India, 17 November 2016. Mother Teresa was born Agnes Gonxha Bojaxhiu on 26 August 1910 to Albanian parents in Skopje, Macedonia (FYROM) and died on 05 September 1997 in Calcutta, India. She began her missionary work with the poor in Calcutta in 1948, and won the Nobel Peace Prize in 1979. Following her death in 1997 she was beatified by Pope John Paul II and given the title Blessed Teresa of Calcutta.  EPA/JAGADEESH NV  EPA/JAGADEESH NV

Jagadeesh NV/EPA

An Indian cyclist passes a mural depicting Catholic nun Mother Teresa, in Bangalore, India. Photo Jagadeesh NV/EPA 

 (EDITORS NOTE: Image shot in black and white using a panoramic app on an iPhone 6.) A machine used to dig ISIL tunnels is seen at the Iraqi Army Armoured Ninth Division base on November 13, 2016 in Qaraqosh, Iraq. ISIL took control of Mosul, Iraq's second largest city in June of 2014. For the past two years they have occupied the city. On the 17th of October 2016. Iraqi forces began the Mosul offensive to take back the city. The offensive was a joint effort by Iraqi Government forces, the Peshmerga, local tribal militias and air support from the US and UK military. Despite early progress the offensive has slowed in the past week as Iraqi forces encountered heavy resistance from ISIL fighters entrenched inside the city. The use of an extensive tunnel system under the city built by ISIL over the past two years, booby traps, snipers and roads riddled with IED's has slowed the advance of troops on the ground. As the offensive enters its fourth week, fears of a humanitarian crisis grow as up to 1 million civilians are believed to be trapped inside the city.  (Photo by Chris McGrath/Getty Images)

Chris McGrath/Getty

A machine used to dig tunnels for Islamic State is seen at the Iraqi Army Armoured Ninth Division base in Qaraqosh, Iraq. This photo was taken using a panoramic app on an iPhone 6. Chris McGrath/Getty

Danish Siddiqui/Reuters

A ground staff member chases a dog in the field. India vs England in the Second Test cricket match at Dr. Y.S. Rajasekhara Reddy ACA-VDCA Cricket Stadium 

NOVEMBER 16:  Scottish red deer graze in Glen Etive following the end of the rutting season on Novemebr 16, 2016 in Glen Etive,Scotland. The rutting season sees the large dominant red deer stags compete against each other for mating rights and can be heard roaring and bellowing in an attempt to attract the hinds. The rut draws to a close in early November when the stags spend the winter feeding to regain strength for the following season.  (Photo by Jeff J Mitchell/Getty Images)

Jeff J Mitchell/Getty

Scottish red deer graze in Glen Etive following the end of the rutting season in Scotland. The rutting season sees the large dominant red deer stags compete against each other for mating rights and can be heard roaring and bellowing in an attempt to attract the hinds. The rut draws to a close in early November when the stags spend the winter feeding to regain strength for the following season. Photo Jeff J Mitchell/Getty

 Indian laborers handle banana branches at the largest and busiest wholesale fruit market in Calcutta, eastern India, 16 November 2016. Media reports state major wholesalers are facing troubles selling their stock of fresh fruits and vegetables as cash shortages continues to affect the market.  Indian Prime Minister Narendra Modi announced the elimination of the 500 and 1,000 rupee bills (7.37 and 14.73 US dollars, respectively), hours before the measure took effect at midnight 08 November, for the purpose of fighting against 'black money' (hidden assets) and corruption in the country. The decision sparked some protests, while storekeepers complained about dwindling sales because many citizens lack the cash to buy the most basic products, as lines get longer at ATMs and banks.  EPA/PIYAL ADHIKARY

Piyal Adhikary/EPA

Indian laborers handle banana branches at the largest and busiest wholesale fruit market in Calcutta, India. Photo Piyal Adhikary/EPA 

A man is battered by a wave as he walks along the seafront in New Brighton, northern England November 16, 2016.

Phil Noble/Reuters

A man is battered by a wave as he walks along the seafront in New Brighton, northern England. Photo Phil Noble/Reuters 

Indian villagers wait in a queue outside a bank to deposit and exchange 500 and 1000 rupee notes in Chandrapur Village, some 30 kms from Guwahati on November 15, 2016.  / AFP / Biju BORO        (Photo credit should read BIJU BORO/AFP/Getty Images) *** BEST

Biju Boro/AFP/Getty

Indian villagers wait in a queue outside a bank to deposit and exchange 500 and 1000 rupee notes in Chandrapur Village. Photo Biju Boro/AFP/Getty

A man places newly made clay pots in a fire pit at a workshop in Biyagama, Sri Lanka November 16, 2016. REUTERS/Dinuka Liyanawatte

Dinuka Liyanawatte/Reuters

A man places newly made clay pots in a fire pit at a workshop in Biyagama, Sri Lanka. Photo Dinuka Liyanawatte/Reuters 

Schoolchildren look at a lifelike animatronics display of a dinosaur at the dinosaur-themed Zoo-rassic Park in Singapore on November 16, 2016.  To raise awareness on the sixth mass extinction, the Singapore Zoo and River Safari displayed lifelike dinosaur animatronics where visitors can trail along the Dinosaur Valley which does not involve living animals. / AFP PHOTO / ROSLAN RAHMANROSLAN RAHMAN/AFP/Getty Images

Roslan Rahman/AFP/Getty

Schoolchildren look at a lifelike animatronics display of a dinosaur at the dinosaur-themed Zoo-rassic Park in Singapore. Photo Roslan Rahman/AFP/Getty