What makes a watch the most valuable in the world? It’s supercomplicated – literally. In 1925 banker Henry Graves Jr. (considered the greatest watch collector of the 20th century) commissioned Patek Philippe to create a unique gold pocket watch. When Graves finally received it – eight years later – it was the most complex timepiece ever created by human hands... (Photo by Suzanne Plunkett/Reuters)

A coil-shaped Helix Nebula showing a fine web of filamentary “bicycle-spoke” features embedded in the colorful red and blue ring of gas. At 650 light-years away, the Helix is one of the nearest planetary nebulae to Earth. A planetary nebula is the glowing gas around a dying, Sun-like star. (Photo by Reuters/NASA)

People swim underwater at Clovelly Beach on December 14, 2023 in Sydney, Australia. A severe heat wave hit Sydney over the weekend, a precursor of hot and dry conditions expected for the rest of the summer which will also bring heightened bushfire risk. The mercury rose to alarming levels again on Thursday. (Photo by Jenny Evans/Getty Images)

Red-crowned cranes, dancing gracefully in the snowy fields, spread their wings and perform a “courtship dance” at the feeding area of the ”Tsurui Ito Red-crowned Crane Sanctuary” in the village of Tsurui, in Japan's northern island of Hokkaido on February 15, 2025. (Photo by JIJI Press/AFP Photo)

Children walk behind their Morrocoye, a terrestrial tortoise native to South America, before a tortoise race held to celebrate the upcoming feast day of Saint Francis of Assisi, the patron saint of animals, in the town of San Francisco de Asis, Venezuela, on October 3, 2025. (Photo by /Juan Carlos Hernandez/Reuters)

Yanna Xian, 24, and her boyfriend Mitch Brown, 27, were swimming while on a boat tour off Honolulu, Hawaii last year, when a curious two-week-old humpback approached them. (Photo by South West News Service)

A Ukrainian serviceman fires with a ZU-23-2 anti-aircraft cannon at a position near a front line in the Kharkiv region, as Russia's attack on Ukraine continues, Ukraine on August 10, 2022. (Photo by Vyacheslav Madiyevskyy/Reuters)