Well that's certainly an attention-grabbing headline! I'm assuming they're talking about an airburst type meteor like in Tunguska? I don't have access to the p

Well that's certainly an attention-grabbing headline! I'm assuming they're talking about an airburst type meteor like in Tunguska? I don't have access to the paper. EDIT: can an airburst meteor include a nuclear explosion? Would a comet or asteroid have such plutonium/uranium material, has that been observed in nature?