The ancestor of all mammals (including humans) is said to be an animal similar to a rat. The recent media splash (originally published in The New York Times) about finding the hypothetical common ancestor of all mammals is based upon nothing more than the evolutionary argument (assumption) that DNA and biological similarities between species is evidence for common ancestry. However, what if the DNA... 

Scientists laser scanned several skeletons of modern-day mammals in order to measure the minimum amount of skin needed to cover them Biologists at the University of Manchester have developed a method of measurement, which shows that dinosaurs were not as big and heavy as previously though. According to the study, published in the journal Biology Letters, scientists laser scanned several skeletons of... 

Its body would have been just a few cm in length. Its feet indicate it often scurried about in the trees. A small, 160-million-year-old Chinese fossil has something big to say about the emergence of mammals on Earth. The shrew-like creature is the earliest known example of an animal whose kind evolved to provide nourishment to their unborn through a placenta. Its features clearly set it apart from...