People walk on the edge of the crater of La Fossa, on Vulcano Island, in the Aeolian Archipelago of Sicily, on 9 July 2026. A team of researchers from Germany are testing a new system for measuring volcanic gases to better anticipate future eruptions. Hovering over the crater of La Fossa, a drone positions itself in front of a laser beam set at the edge of the chasm on Vulcano, off Sicily, and collect data. (Photo by Marco Bertorello / AFP via Getty Images)