This story was originally published in Undark and appears here as part of the Climate Desk collaboration. About 18 years ago, Andrea Colla got an unusual request. Would he come survey the fauna of a Nazi air-raid shelter? Even by entomologists’ standards, the task was weird. This warren lay under the Italian city of Trieste, and it was built in secret between 1943 and 1944 at the orders of a war criminal who wanted a subterranean escape route from his villa. Eventually, the tunnels had become a museum, managed by…