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)

“A Mothers Tail”. A baby cub pulls on his mother's tail to get attention. Photo location: Masai Mara, Kenya. (Photo and caption by Tori Marsh/National Geographic Photo Contest)

Medical staff celebrate after all patients were discharged at a temporary hospital set up to treat people with the COVID-19 coronavirus in Wuhan in China's central Hubei province on March 9, 2020. China closed most of its makeshift hospitals for coronavirus patients, some schools reopened and Disney resort staff went back to work on March 9 as normality slowly returns to the country after weeks battling the epidemic. (Photo by AFP Photo/China Stringer Network)

British model and fashion designer Stella Tennant in Chanel Swimwear, collection Automne-Hiver 1995-96 at Paris Fashion Show in Paris on October 20, 1995. Stella Tennant, one of the most renowned catwalk models and cover-stars of the 1990s, has died aged 50, her family announced on December 23, 2020. “It is with great sadness we announce the sudden death of Stella Tennant on 22nd December 2020”, the statement said. (Photo by Neville Marriner/ANL/Rex Features/Shutterstock)

In this Thursday, May 24, 2018, photograph, artists of Ukraine's Artel Myth theatre perform “A day in the life of Ukrainians” at the Living Statues International Festival, in Bucharest, Romania. Up to thirty thousand people enjoyed a week of street performances by reputed artists from eight countries in the “largest European festival of the genre”. (Photo by Vadim Ghirda/AP Photo)

The Big Island's Mauna Loa Volcano erupts on November 28, 2022 on the Island of Hawaii. For the first time in almost 40 years, the biggest active volcano in the world erupted prompting an emergency response on the Big Island. (Photo by Andrew Richard Hara/Getty Images)

British television actress Tracy Shaw poses during a photoshoot held in 2000, in England. (Photo by Stephen Perry/Getty Images)

Sarah Everhardt of the U.S. performs during the gala exhibition in the ISU Four Continents Figure Skating Championships at the Mokdong ice rink in Seoul, South Korea, Sunday, February 23, 2025. (Photo by Lee Jin-man/AP Photo)