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 large storm cloud covers the Sydney CBD on March 5, 2014 in Sydney, Australia. A severe thunderstorm warning was issued for the Sydney metropolitan area late this afternoon with heavy rainfall due to cause flash flooding in areas. (Photo by Cassie Trotter/Getty Images)

People watch on from Marks Park as a thunderstorm gathers off Bondi Beach on November 13, 2020 in Sydney, Australia. The Bureau of Meteorology issued a number of severe weather alerts for the region today, with a high risk of thunderstorms and hail. (Photo by Brook Mitchell/Getty Images)

Aerial view of tourists cooling off at a water park in summer on June 27, 2023 in Zhengzhou, Henan Province of China. Zhengzhou Meteorological Observatory on June 27 issued an orange alert for high temperatures. (Photo by VCG/VCG via Getty Images)

A participant has his body painted before a regional bodybuilding championship in Stavropol, southern Russia, April 10, 2016. (Photo by Eduard Korniyenko/Reuters)

English-Albanian singer and songwriter Dua Lipa shows off her end-of-summer body in the last decade of August 2023. (Photo by dualipa/Instagram)

Actress Athene Seyler attempts to contort her body, in a scene from the show, “Skin Deep”. (Photo by Sasha/Getty Images). Circa 1928

A PETA (People for the Ethical Treatment of Animals) activist with her body painted promotes veganism in Bangkok April 21, 2016. (Photo by Jorge Silva/Reuters)