Fossilized poo harbours remains from mammoths, bison and big cats, including some of the oldest DNA ever reconstructed.

Fossilized poo harbours remains from mammoths, bison and big cats, including some of the oldest DNA ever reconstructed.

A complex ecosystem of woolly mammoths, bison, horses and big cats has been elucidated by studying the faeces of small rodents that probably ate the bigger animals