A demonstrator participates in a chant outside the Main Building on campus with hundreds of other students. Professors, students, and supporters of UT-Austin demonstrate on campus, Thursday, April 25, 2024, in Austin. (Photo by Ricardo B. Brazziell/Austin American-Statesman via AP Photo)

An Iranian woman without wearing her mandatory Islamic headscarf flashes a victory sign as two head-to-toe veiled women walk at the old main bazaar of Tehran, Iran, Thursday, June 13, 2024. (Photo by Vahid Salemi/AP Photo)

Giant panda Yu Ai enjoys fruit “kebabs” at Chongqing Zoo on November 30, 2024 in Chongqing, China. (Photo by Li Hongbo/VCG via Getty Images)

Tourists fly in hot air balloons over the west bank of the Nile River on January 9, 2025 in Luxor, Egypt. Luxor, which contains the historical city of Thebes, capital of ancient Egypt's pharaohs at the height of their power, is full of pharaonic monuments and other antiquities. (Photo by Ahmad Hasaballah/Getty Images)

Revelers from Grande Rio Samba School perform during the night of the Carnival parade at the Sambadrome, in Rio de Janeiro, Brazil, on February 12, 2024. (Photo by Tita Barros/Reuters)

Wedges of an orange generate enough current and electrical juice – 3.5 volts – to power an LED. The fruit’s citric acid helps electrons flow from galvanized nails to copper wire in this 14-hour exposure. This image was published in September’s Visions of Earth, a trio of photos that appear in each issue of National Geographic. (Photo by Caleb Charland/National Geographic)

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)

Princess Diana relaxes on the sand during a visit to the beach on the Caribbean Island of Nevis January 4, 1993. (Photo by Mark Cardwell/Reuters)