Afghan children enjoy their time on Nadir Khan hill during the first day of Eid al-Fitr in Kabul, Afghanistan, Friday, April 21, 2023. (Photo by Ebrahim Noroozi/AP Photo)

A dolphin swims alongside ships and fishing boats at the Bosphorus in Arnavutkoy district of Istanbul, Turkiye on May 21, 2023. (Photo by Isa Terli/Anadolu Agency via Getty Images)

Mercedes Russell #21 of the Seattle Storm defends Aliyah Boston #7 of the Indiana Fever during the first quarter at Climate Pledge Arena on June 22, 2023 in Seattle, Washington. (Photo by Steph Chambers/Getty Images)

Greece competes in the final of the women's team free artistic swimming event during the World Aquatics Championships in Fukuoka on July 21, 2023. (Photo by François-Xavier Marit/AFP Photo)

Athletes compete in the women's 100m semi-final during the World Athletics Championships at the National Athletics Centre in Budapest on August 21, 2023. (Photo by Andrej Isakovic/AFP Photo)

A SpaceX Falcon 9 rocket lifts off in Florida on Saturday, October 21, 2023. The rocket is carrying 23 Starlink satellites. (Photo by Malcolm Denemark/AP Photo)

A participant marches during the Tokyo Rainbow Pride parade, celebrating advances in LGBTQ+ rights and calling for marriage equality, in Tokyo, Japan on April 21, 2024. (Photo by Issei Kato/Reuters)

The NASA Extreme Environment Mission Operations (NEEMO) 21 mission began on July 21 as an international crew of aquanauts splashed down to the undersea Aquarius Reef Base, located 62 feet below the surface of the Atlantic Ocean in the Florida Keys National Marine Sanctuary. The NEEMO 21 crew will perform research both inside and outside the habitat during a 16-day simulated space mission. During simulated spacewalks carried out underwater, they will evaluate tools and mission operation techniques that could be used in future space missions, including journeys to Mars. (Photo by Karl Shreeves/NASA)