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Your scenarios aren't remotely close to "absolute worst-case". A large enough asteroid can sterilize the planet with fire/lava.
by bufferoverflow 8y ago
Your scenarios aren't remotely close to "absolute worst-case". A large enough asteroid can sterilize the planet with fire/lava.
- lisper 8y agoYes, that's true, but asteroids of that size are easily detected. We know where all of them are, and none of them are on a collision course with earth. If we ever find that size asteroid on a collision course, we will have decades, probably centuries, of warning, and it will be fairly straightforward to deflect it. The real danger comes from medium-sized asteroids that we don't see until it's too late to do anything about it. Those can destroy civilization in a worst-case scenario, but will not cause homo sapiens to go extinct.