Graduates dance as they take part in a “Last school bell” ceremony at a school in Minsk, Belarus on May 30, 2018. (Photo by Vasily Fedosenko/Reuters)

Split-view of a killer whale at sunrise off the coast of Northern Norway. At least half of the world’s killer whale populations are doomed to extinction due to pollution of the oceans, a new study says. (Photo by Audun Rikardsen/Science)

A street artist makes soap bubbles in front of the Alte Nikolaikirche church at the Roemerberg square in Frankfurt am Main, western Germany, on August 12, 2018. (Photo by Frank Rumpenhorst/DPA/AFP Photo)

Marta Garcia (R) of Spain loses the champgane bottle standing on the podium next to winner Jamie Chadwick of Great Britain after the first race of the W Series at Hockenheimring on May 04, 2019 in Hockenheim, Germany. W Series aims to give female drivers an opportunity in motorsport that hasn’t been available to them before. The first race of the series, which encompasses six rounds on the DTM support programme, is at the Hockenheimring on May 3rd and 4th. (Photo by Kai Pfaffenbach/Reuters)

Grumpy Cat in Las Vegas, America on August 5, 2014. Grumpy Cat aka Tardar Sauce has died on May 14, 2019 at home in Arizona at the age of seven due to complications from a urinary tract infection. Her family's statement said: “Besides being our baby and a cherished member of the family, Grumpy Cat has helped millions of people smile all around the world – even when times were tough. Her spirit will continue to live on through her fans everywhere. Grumpy's Family – Tabatha, Bryan and Chyrstal”. (Photo by Mediapunch/Shutterstock)

A Chinese ethnic Lisu honey hunter holds a large piece of wax from a hive while gathering wild cliff honey in a gorge on May 10, 2019 near Mangshi, in Dehong prefecture, Yunnan province China. (Photo by Kevin Frayer/Getty Images)

Imaan Hammam and Rihanna attend the FENTY x Webster Pop-up Cocktail at The Webster on June 18, 2019 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Fenty)

Mud Day Queen Riley Tulgetske, left, embraces Mud Day King Phoenix Crowder during Mud Day at the Nankin Mills Park, Tuesday, July 9, 2019, in Westland, Mich. The annual day is for kids 12 years old and younger. While parents might be welcome, this isn't an event meant for teens or adults. It's all about the kids having some good, unclean fun during their summer break and is sponsored by the Wayne County Parks. (Photo by Carlos Osorio/AP Photo)