The best preserved meteor crater on earth! How big do you think the meteor was? ☄️ About 50,000 years ago, a rock fragment broke away from the asteroid belt and hurtled toward earth. The rock, composed of nickel and iron, was about __ meters across and weighed 300,000 tons. It was traveling at 12.8 kilometers per second. When it crashed into the plains of Arizona, it exploded with a force equal to 10 megatons or about 150 times the force of the atomic bomb that destroyed Hiroshima. The violence