“Hippo Chase”. As we approached the camp the Selinda Reserve of northern Botswana our boat passed by a hippo resting in the water. I turned around to look back at the boat's wake and saw the hippo charging after us! The hippo must've been tired from an all-nighter because he was angry. He rose way up out of the water three times trying to chase our boat! He was coming at us with such force that he created a wake of his own. Photo location: Selinda Reserve of northern Botswana. (Photo and caption by Curtis Simmons/National Geographic Photo Contest)

Festival goers splash through a muddy puddle at Worthy Farm in Somerset, on the third day of the Glastonbury music festival June 27, 2014. (Photo by Cathal McNaughton/Reuters)

A pro-democracy demonstrator fights with a Soviet soldier on top of a tank parked in front of the Russian Federation building on August 19, 1991, after a coup toppled Soviet President Mikhail Gorbachev. The same day, thousands in Moscow, Leningrad, and other cities answered Russian Republic President Boris Yeltsin's call to raise barricades against tanks and troops. (Dima Tanin/AFP/Getty Images)

A Filipino Catholic performing self-flagellation lies on the ground with his bloodied back outside a church on Good Friday, defying a government ban on religious gatherings amid rising coronavirus disease (COVID-19) cases, in Manila, Philippines, April 2, 2021. (Photo by Eloisa Lopez/Reuters)

A Buddhist monk wearing a protective mask walks around the Sewu temple during the celebrations of Vesak Day, marking the birth, enlightenment and death of Buddha, amid the coronavirus disease (COVID-19) pandemic in Sleman, Yogyakarta, Indonesia, May 26, 2021. (Photo by Willy Kurniawan/Reuters)

A model prepares backstage during the bridal fashion show as a part of Yes Wedding Expo at Convention Hall Tunjungan Plaza on June 13, 2021 in Surabaya, Indonesia. (Photo by Robertus Pudyanto/Getty Images)

Garbage, including plastic waste, is seen at the beach of Costa del Este, in Panama City, on April 19, 2021. Every two weeks, Marine Biology students descend about five meters in the sea to take care of a coral nursery of the staghorn species (Acropora cervicornis) in Portobelo, Panama, with which they aim to restore reefs damaged by climate change and pollution, as part of the Reef2Reef project. (Photo by Luis Acosta/AFP Photo)

A United States Border Patrol agent on horseback tries to stop a Haitian migrant from entering an encampment on the banks of the Rio Grande near the Acuna Del Rio International Bridge in Del Rio, Texas on September 19, 2021. The United States said Saturday it would ramp up deportation flights for thousands of migrants who flooded into the Texas border city of Del Rio, as authorities scramble to alleviate a burgeoning crisis for President Joe Biden's administration. (Photo by Paul Ratje/AFP Photo)