HUMANS have walked the earth for over a million years, but how much longer does our species have left? Scientists have spent decades obsessing over how humans will go extinct, and some of their terrifying theories are far more plausible than you’d like to think. We’ve seen nightmare scenarios unfold in countless disaster movies, but we all know that one day our species will be no more. While it’s possible that our population could decline naturally, or that we will evolve into a new, better species, there are also some less comforting theories about human extinction. From angry aliens to grey goo, here are some of science’s most terrifying takes on how humans will go extinct…
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