A visitor inspects the Dobsina ice cave as workers dig drainage ditches for the rapidly melting ice and the water coming from it, near the village of Dobsina, Slovakia, on April 19, 2024. The unique ice cave has recently been under the scrutiny of experts who are investigating whether the cave is threatened by climate warming and whether the ice is disappearing from the underground as fast as the Arctic glaciers. According to the geologists, the difference between ice gain and loss is alarming. #

A couple sits on Tourkovounia hill, as southerly winds carry waves of Saharan dust, in Athens, Greece, on April 23, 2024. Clouds of dust blown in from the Sahara covered Athens and other Greek cities that day, one of the worst such episodes to hit the country since 2018, officials said. #

Police officers react as supporters of the opposition hurl Molotov cocktails at the mayor's office, accusing him of corruption, in Tirana, Albania, on April 19, 2024. #

People hold up flares during a funeral ceremony for serviceman Pavlo Petrychenko on April 19, 2024, in Kyiv, Ukraine. Petrychenko, 31, died in the Donetsk Oblast during a combat mission. #

Workers near Saint-Emilion, France, on April 23, 2024, light anti-frost candles installed in a vineyard to keep temperatures above freezing and prevent damage to the vines. #

Police intervene and arrest more than 100 students at NYU, where students continued their demonstration on campus in solidarity with the students at Columbia University, and to oppose Israel's attacks on Gaza, in New York City on April 22, 2024. Pro-Palestine protesters have launched a wave of protests on campus condemning Israel's offensive in the Gaza Strip, which has displaced more than 75 percent of the enclave's estimated 2.3 million people, and resulted in more than 34,000 deaths, according to Gaza health officials. #

Locals carry out search-and-rescue efforts after an Israeli attack trapped many Palestinians under rubble in the Tel al-Sultan district of Rafah, Gaza, on April 20, 2024. #

An activist with a painted face symbolizing the number of days spent in captivity attends the Free Azov rally in support of the captured defenders of Mariupol on April 21, 2024, in Kyiv, Ukraine. Participants came out to remind others about the Ukrainian soldiers who have been held in Russian captivity for more than two years. #

A junior Red Rebel accompanies a funeral bier on April 20, 2024, in Bath, England. Hundreds of Extinction Rebellion Red Rebels took to the streets in a mass procession to mark a massive decline of the natural world in the lead-up to Earth Day, citing the U.K. as one of the most nature-depleted countries in the world. #

A visitor dressed as the Earl of Lemongrab from the show Adventure Time attends day two of the Scarborough Sci Fi weekend on April 21, 2024, in Scarborough, England. #

Boys on horses ride through the Ambelia refugee camp as a storm approaches on April 20, 2024, in Adré, Chad. Since the beginning of the recent conflict between the paramilitary Rapid Support Forces and the Sudanese Armed Forces, in March 2023, more than 600,000 new refugees have crossed the border from Darfur, Sudan, into Chad. The total number of refugees, including those from previous conflicts, now stands at 1.2 million. Aid agencies, already struggling with acute supply shortages, have warned that the lifesaving programs in Chad will "grind to a halt in a matter of weeks without urgent funding." Chad is now home to one of the largest and fastest-growing refugee populations in Africa. #

An aerial view of Polish highlanders walking with their sheep during the Redyk, a celebration to start the sheep-grazing season in Ludźmierz, Poland, on April 21, 2024. #

Ryan Trimmer and Chris Phillips participate in the Pinner Wheelbarrow Race as part of a St. George's Day celebration in northwest London on April 21, 2024. The race has been held for the past 61 years and involves teams of two taking turns pushing each other in a wheelbarrow through the streets of Pinner while drinking beer. #

A hotel in Hualien, Taiwan, which had been previously damaged in an April 3 earthquake, tilts further to one side after a series of earthquakes overnight, seen on April 23, 2024. Taiwan was shaken by dozens of earthquakes overnight and into April 23 that left buildings swaying and some tilting. The government says they were aftershocks from the deadly quake that hit the island more than two weeks ago. #

An aerial view of teams conducting an operation to open a mountain highway that has been closed for about four months because of avalanche danger in the Bahcesaray district of Van, Turkey, on April 19, 2024 #

Incoming Columbine High School freshmen Ava Kyle (left) and Ellie Fairweather, both of Littleton, Colorado, place flowers atop the Columbine Memorial in Clement Park on the 25th anniversary of the school shooting, on April 20, 2024, in Littleton, Colorado. Two students killed 12 of their classmates and one teacher and injured many more on April 20, 1999. #

The Mount Ruang volcano erupts in Sitaro, North Sulawesi, on April 19, 2024. The remote Indonesian volcano sent a tower of ash spewing into the sky on April 19, after nearly half a dozen eruptions earlier in the week forced thousands to evacuate when molten rocks rained down on their villages. #