This aerial view shows people walking on the edge of the crater of La Fossa, on Vulcano Island, with Lipari and Salina islands in the background, 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)