Earth Impacts
Earth Impacts
Most meteoroids are very small, pea-sized or less. When they hit the Earth's atmosphere, they burn up and we see them as meteors:
Larger objects can also hit, but are rarer. We see them as fireballs, and they sometimes make it to the ground -- impact!
But what about something really big?
We see evidence that big things have hit in the past:
Barringer Crater (Arizona, 1km, 50,000 years old):
Wolfe Creek (Australia, 1 km, 300,000 years old):
Manicouagan (Quebec, 100 km, 200 million years old):
