Internally displaced Syrians who fled Raqqa tie ropes for their tents in a camp in Manbij, Syria on April 6, 2017. (Photo by Rodi Said/Reuters)

An albino woman adjusts her costume backstage as she and others wait for their fashion show during the Mr. & Miss Albinism East Africa contest in Nairobi, Kenya, 30 November 2018. Hudreds of abino men, women and children participated in the contest to raise awareness on discrimination and stigma against albinism in the region. (Photo by Dai Kurokawa/EPA/EFE)

Participants wear traditional clogs as shepherds lead their sheep through the center of Madrid, October 28, 2012. (Photo by Andres Kudacki/Associated Press)

A large Mantle or Desk Clock featuring a fossil ammonite at its center, carved from the South American wood Keolbra with radiating Walnut spines. The clock hangs on a round, Plexiglass back supported by a wood base (Bubinga). The clockworks is a quartz, high-torque movement that runs on a single AA battery.

A woman waits at a polio immunisation health centre, in Maiduguri, Borno State, Nigeria, August 29, 2016. Nigeria's military has liberated large swathes of land from Boko Haram but a ride with an army convoy, all guns firing for fear of ambush, shows how far the northeast is from normality after a brutal Islamist insurgency that has displaced millions. (Photo by Afolabi Sotunde/Reuters)

Wedges of an orange generate enough current and electrical juice – 3.5 volts – to power an LED. The fruit’s citric acid helps electrons flow from galvanized nails to copper wire in this 14-hour exposure. This image was published in September’s Visions of Earth, a trio of photos that appear in each issue of National Geographic. (Photo by Caleb Charland/National Geographic)

Cairo-based artist Chanel Arif's paints for her art project called After Dinner that uses humans and their surroundings as her canvas, in her gallery in the capital of Cairo, Egypt March 2, 2017. (Photo by Sherif Fahmy/Reuters)

TV and radio host Lizzie Cundy, 46, attends the World Premiere of “The Hatton Garden Job” at The Curzon Soho on April 11, 2017 in London, England. (Photo by Fame Flynet)