Frozen squirrel poop from Yukon is a treasure trove of woolly mammoth, horse DNA

https://i.cbc.ca/ais/09c64155-c2f6-4319-86f9-9d08edc32d1f,1781107489920/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C653%2C2550%2C1434%29%3BResize%3D%28620%29" title="An artist’s reconstruction of Pleistocene Yukon, showing Arctic ground squirrels scavenging meat and foraging on plants within the mammoth-steppe ecosystem.

Ancient DNA from their preserved burrows and faeces reveals this complex food web—where even small rodents fed on megafauna like mammoths." width="620" />

Scientists have reconstructed genomes of woolly mammoths, horses, steppe bison and ground squirrels that roamed the grasslands of the Canadian Arctic as far back as 700,000 years ago using DNA found in frozen squirrel poop from the Yukon.