About 50,000 years ago, during the Pleistocene epoch, a nickel-iron meteorite about 160 feet across
About 50,000 years ago, during the Pleistocene epoch, a nickel-iron meteorite about 160 feet across struck Arizona at a speed up to 20 kilometers per second.With the explosive power of about 10 megatons, a crater 3,900 ft wide and 570 feet deep was excavated in seconds.The crater was over 10,000 years old when the first humans saw it, at the earliest, 40,000 years ago.#science #nature #earth #meteorite #pleistocene #arizona -- source link
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