Workers attempt to bring a tranquillised black rhino to the ground before dehorning in an effort to deter the poaching of one of the world's endangered species, at a farm outside Klerksdorp, in the north west province, South Africa, February 24, 2016. (Photo by Siphiwe Sibeko/Reuters)

One of the most significant challenges related to cancer in Nepal is the lack of awareness around the prognosis of the disease, as many patients, their families and even healthcare professionals consider cancer to be an incurable disease at any stage. This results in significant delays in bringing patients to hospitals, and high rates of advanced stage cancers and mortality. (Photo by Omar Havana)

An actor portraying Jesus Christ takes part in the interactive street-theatre Passion play “Il-Mixja” (The Way), one of a series of Holy Week activities in the run-up to Easter, in the grounds of Mount Carmel Mental Hospital in Attard, outside Valletta, Malta, March 22, 2016. (Photo by Darrin Zammit Lupi/Reuters)

A boy collects drinking water from a hand pump in Kutubdia, Bangladesh on March 30, 2016. Kutubdia is one of many islands affected by some of the fastest recorded sea-level rises in the world. The island has halved in size in 20 years. (Photo by SIipa/Rex Features/Shutterstock)

Dancers wearing masks and kimonos perform in the streets at the “Super Yosakoi 2015” dance festival in Tokyo on August 30, 2015. One hundred dance teams with some 5,500 people participated in the two-day summer festival event. (Photo by Yoshikazu Tsuno/AFP Photo)

The Jet Propulsion Lab team's RoboSimian robot turns on a valve at a simulated disaster-response course during day one of the Defense Advanced Research Projects Agency (DARPA) Robotics Challenge finals in Pomona, California, June 5, 2015. (Photo by David McNew/Reuters)

A woman looks at artwork called “Alphabetti Spaghetti” by British sculptor Alex Chinneck, one of a series of “knotted” postboxes, installed as part of a public art trail for Kensington & Chelsea Art Week on October 3, 2020. (Photo by Victoria Jones/PA Images via Getty Images)

Apollinariia Panfilova and Dmitry Rylov of Russia perform in the Pairs Short Program during day one of the ISU Grand Prix of Figure Skating Rostelecom Cup at Megasport Arena on November 20, 2020 in Moscow, Russia. (Photo by Evgenia Novozhenina/Reuters)