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)

The galactic core of the Milky Way glows brightly in the clear night sky above St Catherine?s Chapel at Abbotsbury in Dorset, UK on August 2, 2024. (Photo by Graham Hunt/Alamy Live News)

The Brocken specter or mountain spectre phenomenon, where the shadow of an observer is magnified and cast on a cloud opposite from the sun or bright light source, is observed on the Howgills, outside Sedbergh, Britain, on December 26, 2024. (Photo by Suzanne Plunkett/Reuters)

A U.S. Marine kneels beside a Multi-Utility Tactical Transport ( MUTT) during a patrol as part of Rim of the Pacific (RIMPAC) 2016 an exercise held at Camp Pendleton, California United States, July 13, 2016. (Photo by Mike Blake/Reuters)

A woman cools off after taking a traditional steam bath (banya) at Sergei Benke's homestead in the village of Bobrovka, Tarsky District in Omsk Region, Russia on December 11, 2020. (Photo by Sergei Malgavko/TASS)

Supporters of the PHTK presidential candidate Jovenel Moise strike zombie poses during a protest march demanding the resignation of interim President Jocelerme Privert in Port-au-Prince, Haiti, Tuesday, June 7, 2016. The electoral council of Haiti has decided to re-do a presidential election that a special commission determined was marred by fraud. (Photo by Dieu Nalio Chery/AP Photo)

Tourists in the Serengeti, Tanzania in the second decade of February 2024, get more than they bargained for as a cheetah jumps on the bonnet of their jeep to make their acquaintance. (Photo by Ann Aveyard/Animal News Agency)

The stunning shots capture the moment a female bear and her two cubs enjoyed the last warm rays of the sun at the Arctic National Wildlife Refuge in Kaktovik, Alaska. The bears can be seen gazing at the vibrant sunset and appear to revel in the tranquil moment as they bask in the array of colors. (Photo by Sylvain Cordier/Caters News)