Origin of Mammals

Thursday, February 7, 2013

The origin of mammals go back to Protungulatum donnae, an ant-eating animal that had the size of a rat and that lived in the late Cretaceous, about 145 million years ago. The ancestor of mammals was an archaic warm-blooded ungulate with a long furry tail and small ears, according to a six-year study of the mammalian family tree, carried out by scientists of Stony Brook University, Long Island. The fossil remains of this creature were found in Cretaceous aged rocks in Montana in 2011, which confirmed the research already already going on.