the above is not related to the recent ural meteor, but just as a reference in size. it is nearly 1 mile across, 2.4 miles in circumference and more than 550 feet deep. this crater in arizona was created 50,000 years ago long before humans inhabited the area, and was surely a site to see. it is now designated as a national natural wonder. the land is privately owned.

spectacular! and this wasn’t even the biggest one for russia. there was always the mystery of tunguska. to this day no one knows if that was a meteor or some secret russian nuclear test? by xy