The strange shape of a 66 million year old 'crazy beast'
Scientists discovered the 66 million-year-old fossil of the world's oldest mammal, with a very bizarre shape.The new finding helps explain why mammals have better hearing
Modern mammals, including humans, can pick up sounds through three tiny bones in the middle ear, which don't exist in ancestral reptiles.Finding fossils of squirrels with ancient sword teeth
A new study shows that fossil skulls and canines of a mammal-like shrew have been found in Argentina.