700,000-year-old squirrel poop reveals a lost Arctic world of mammoths, horses, and giant predators |
A sealed vial of sediment pulled from Yukon permafrost does not look like a breakthrough. It looks like dirt until the sequencing results arrive. Inside it, scientists from institutions including McMaster University and the University of Alberta found genetic traces of mammoths, horses, and predators that have not roamed the Arctic for tens of thousands…