The debris landed like missiles, digging out two canyons comparable in size to Arizona's Grand Canyon in barely 10 minutes. The latter, by comparison, took millions of years to form.

The debris landed like missiles, digging out two canyons comparable in size to Arizona’s Grand Canyon in barely 10 minutes. The latter, by comparison, took millions of years to form.

The debris landed like missiles, digging out two canyons comparable in size to Arizona’s Grand Canyon in barely 10 minutes. The latter, by comparison, took millions of years to form. The two ...

How an Ancient Asteroid Strike Carved Out 2 Grand Canyons on ... digging out two canyons comparable in size to Arizona's Grand Canyon in barely 10 minutes. The latter, by comparison, took millions ...