If an asteroid every endangers us as a species I shall hold the Russians responsible for completing the duty of nuking it to stuff.
The asteroid will hit earth. Killing off humanity like the extinction of the Dinosaurs
Uh dude. I'm sure asteroids burn up in entering Earths atmosphere . So I'm sure it wont be the "end" of the world. The asteroid will burn up then hit. Causing a not much big explosion.
If it would be twice the size of the moon it would probably lose around a millionth to a billionth of it's diameter by friction in our atmosphere.