The content originally appeared on: CNN Sign up for CNN's Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The Hiawatha crater was exceptionally well preserved despite glacier ice being incredibly effective at erosion. Its state fueled talk that the meteorite might have hit as recently as 13,000 years ago. However, the crater, which is one of the world's largest, has now been definitively dated - and it is much, much older. In […]
