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)

Four-year-old Solaris Arias (right) jumps through water spraying from an open fire hydrant in Providence, Rhode Island, on June 20, 2012. Much of the state remained under a heat advisory Tuesday afternoon because of the steamy air mass that has moved into the region resulting in temperatures in the 90s. (Photo by Steven Senne/AP Photo)

Andrea Spendolini Sirieix and Lois Toulson of Britain in action during the women's synchronized 10m diving at the Paris Olympics on July 31, 2024. (Photo by Leah Millis/Reuters)

Modern and contemporary fake artworks including Banksy, Pablo Picasso and Andy Warhol are displayed following an Italian Carabinieri operation against a large-scale pan-European forgery network, in Pisa, Italy, on November 9, 2024. (Photo by Carabinieri/Handout via Reuters)

Secondary school graduates play in a fountain as they celebrate the last day of school, traditionally called the “last bell” in central Kiev, Ukraine on May 31, 2019. (Photo by Valentyn Ogirenko/Reuters)

Volunteers use flour to clean birds following an oil spill caused by an incident involving two tankers damaged in a storm in the Kerch Strait, in the village of Vityazevo near the Black Sea resort of Anapa, Russia on December 20, 2024. (Photo by Sergey Pivovarov/Reuters)

Buyan, a male Siberian brown bear, cools down under a stream of water sprayed by an employee in an enclosure on a hot summer day, at the Royev Ruchey zoo in Krasnoyarsk, Russia on June 14, 2019. (Photo by Ilya Naymushin/Reuters)

People train parrots during a parrot-training show held by Kuwaiti bird lovers in Jahra Governorate, Kuwait, December 7, 2020. (Photo by Xinhua News Agency/Rex Features/Shutterstock)