A man applies coats of glass powder to kite strings ahead of the Hindu festival “Uttarayan” in Ahmedabad on December 21, 2023. (Photo by Sam Panthaky/AFP Photo)

A model prepares backstage during the body painting show : Miracle World The Ocean organized by Unipa Surabaya at Grand Atrium Royal Plaza on June 21, 2021 in Surabaya, Indonesia. (Photo by Robertus Pudyanto/Getty Images)

Kayla DiCello of the U.S. in action during the Women's All-Around Final at the World Artistic Gymnastics Championships in Kitakyushu, Japan, October 21, 2021. (Photo by Kim Kyung-Hoon/Reuters)

Los Angeles Chargers wide receiver Keenan Allen runs onto the field before an NFL football game against the Pittsburgh Steelers, Sunday, November 21, 2021, in Inglewood, Calif. (Photo by Ashley Landis/AP Photo)

A woman holding a dog walks out of a plane during a press event introducing Bark Air, an airline for dogs, at Republic Airport in East Farmingdale, New York on May 21, 2024. (Photo by Eduardo Munoz/Reuters)

President Joe Biden holds a baby as he visits a COVID-19 vaccination clinic at the Church of the Holy Communion Tuesday, June 21, 2022, in Washington. (Photo by Evan Vucci/AP Photo)

Performer and artist Aoi Yamada and film director Makoto Nagahisa perfom on stage during a conference at the Cannes Lions International Festival of Creativity in Cannes, France on June 21, 2023. (Photo by Eric Gaillard/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)