You could've said the same thing about crocodiles 54 million years ago, but, hey, 54 million years later we've still got crocs. It's a specious argument. Just

You could've said the same thing about crocodiles 54 million years ago, but, hey, 54 million years later we've still got crocs. It's a specious argument. Just because our species lifespan has been short until now doesn't mean anything about how long it will last from here out. There are other, legitimate reasons to think maybe humans won't last very long, but, this certainly isn't one.