Comet fragments may have exploded over Ohio 1,600 years ago, triggering a violent airburst and starting wildfires that devastated the Hopewell people's crops and the landscape.
Comet impact may have triggered decline of Ohio's Hopewell people 1,600 years ago : Read more
Comet impact may have triggered decline of Ohio's Hopewell people 1,600 years ago : Read more