Relatively minor meltdowns might destroy underwater cables and disrupt vital industries, scientists say, creating a cascade of economic misery.

I just kept thinking, they're all in the same places—all of these systems converge,” says social volcanologist Lara Mani, of the Centre for the Study of Existential Risk (imagine their water cooler chitchat) at the University of Cambridge, lead author on the new paper. “And that's terrifying. Why has no one mentioned this before?”