A new study published in the Proceedings of the National Academy of Sciences has tried to answer the question: did a massive comet explode over Canada 12,900 years ago, wiping out both beast and man in North America and propelling the Earth back into an Ice age? An artistic expression of how a large impact might have looked (Carsten Egestal Thuesen / GEUS) That’s a question that has been hotly debated by scientists since 2007, with the Topper archaeological...
