A child looks at a polar bear swimming under a water in its enclosure on a hot summer day at Prague Zoo, Czech Republic, July 30, 2015. (Photo by David W. Cerny/Reuters)
Students from Vida Nueva School present their dinosaur robot built with recycled materials during the annual robotics fair supported by the Bolivian Education Ministry in La Paz, August 10, 2015. (Photo by David Mercado/Reuters)
Tourists watch the Christmas Day sunrise behind Diamond Head from Waikiki Beach in Honolulu, Friday, December 25, 2015. (Photo by J. David Ake/AP Photo)
The Founders' Award winner, Downey Rose Float Association “Exploring the Everglades” float, moves through 127th Rose Parade in Pasadena, California January 1, 2016. (Photo by David McNew/Reuters)
A man stands on an old train of Bolivian Railways Company from 1870-1900 at the train cemetery in Uyuni, Potosi, Bolivia on May 16, 2018. (Photo by David Mercado/Reuters)
Model Cara Delevingne walks the runway during the Balmain show as part of the Paris Fashion Week Womenswear Spring/Summer 2019 on September 28, 2018 in Paris, France. (Photo by David Fisher/Rex Features/Shutterstock)
A ghost glass frog in the Chocó rainforest, Ecuador in November 2020. The marbled swirling “hypnotising” eyes are thought to be helpful in attracting a mate. (Photo by David Weiller/WENN)