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)

A group of students sit on top of a bus at Kemusu street in Boyolali, Central Java of Indonesia, March 20, 2015 in this picture taken by Antara Foto. (Photo by Yusuf Nugroho/Reuters/Antara Foto)

Winston Leonard Spencer Churchill (1874–1965), British Statesman and Prime Minister inspecting the boys from a training ship. (Photo by Hulton Archive/Getty Images). 1912

Revellers take part in New Year's Eve celebrations in Kyiv, Ukraine on December 31, 2020. (Photo by Valentyn Ogirenko/Reuters)

Palestinian men perform fire breathing on the beach as an entertainment for children during the summer vacation in Gaza City on August 1, 2019. (Photo by Mohammed Abed/AFP Photo)

A person participates in the annual “Battle of the Oranges” in the northern city of Ivrea, Italy on February 19, 2023. (Photo by Massimo Pinca/Reuters)

A participant wearing costumes takes part in the Pride Parade in Bangkok, Thailand, Saturday, June 1, 2024. Thailand is kicking off its celebration for the LGBTQ+ community's Pride Month with a parade on Saturday, as the country is on the course to become the first nation in Southeast Asia to legalize marriage equality. (Photo by Sakchai Lalit/AP Photo)

A dog dressed as a Zoltar fortune telling machine participates in the Halloween Dog Parade in New York. (Photo by Timothy Clary/Getty Images)