A reveller from Unidos da Tijuca samba school performs during the first night of the Carnival parade at the Sambadrome in Rio de Janeiro, Brazil on March 4, 2019. (Photo by Pilar Olivares/Reuters)

A boy doing chin-ups as he takes entrance exams at the Moscow Suvorov Military School in Moscow, Russia on July 11, 2019. (Photo by Sergei Karpukhin/Russian News Agency TASS via Getty Images)

A leather worker with his frightening types of clothes prepares after painted themselves using chimney soot as they participate in a programme within the September 6 celebrations, in Balikesir, Turkey on September 06, 2019. According to the story, “Tulutabaklar” were painting themselves with ash and wearing goatskin or sheep skin to frighten the Greek soldiers occupying Balikesir during the National Struggle period. Every year on September 6, Tulutabaklar perform this ritual as part of the celebration of liberation of the city for 96 years. (Photo by Ali Atmaca/Anadolu Agency via Getty Images)

Parts of the Royal Chariot, which will be used during the late King Bhumibol Adulyadej's funeral later this year is seen at the National Museum in Bangkok, Thailand, February 6, 2017. (Photo by Chaiwat Subprasom/Reuters)

Breath at sunset, captures a sea turtle at a dive site called Black Rock. Kāʻanapali, Hawaiʻi, August 2013. (Photo by Christopher Doherty/Smithsonian.com)

Tourists pose for a selfie in Cancun, October 13, 2015. Cancun's transformation in the 1970s from a small Caribbean fishing village into a strip of nightclubs and high-rise hotels has reduced biodiversity and polluted water resources as infrastructure struggles to keep up. (Photo by Edgard Garrido/Reuters)

Female seal “Lotte” swims in a pool of her enclosure at the zoo in Rostock, northeastern Germany, on September 27, 2019. (Photo by Bernd Wuestneck/dpa/AFP Photo)

An undated handout image provided by UNICEF Germany on 20 December 2016 shows the “UNICEF Photo of the Year 2016” by Iranian freelance photographer Arez Ghaderi. Ghaderi won the first prize for his picture of a girl in a makeshift tent city in the Razavi Khorasan province, Iran, it was announced at a ceremony in Berlin, Germany on 20 December 2016. (Photo by Ariz Ghaderi/EPA/UNICEF Deutschland)