extremophiles
extremophiles are organisms that live in extreme environments. specifically high temperatures and high pressures. so let's say we found something that lived at a temperature 284 celsius above average. that'd probably qualify eh? and if it also lived at 10^16 times average pressure, that's 10,000,000,000,000,000 times normal pressure, that'd definitely qualify, right? congratulations! that's you! and me. and pretty much every other living thing on earth. yeah, we call this place home. but conditions here are so much unlike conditions everywhere else that we are definitely the extremophiles. that might explain why we haven't encountered any aliens yet. they live in the cold dark emptiness of space. nothing could possibly live on the surface of a nuclear bomb while it's exploding right? right?!?! heh. except surprise! we do.