Some sloth lineages grew more than 220 pounds every million years, one of the fastest body growth rates known in the evolution of mammals.
Discovery of three new Jurassic Era animals suggests that early mammals, which resembled squirrels, first emerged 208 million years ago. Continue reading →
Once thought to be pointless and on the evolutionary fast track to disappearance, new research has given the whale pelvis bone a new lease on life.
New research finds that nighttime behavior may have evolved 100 million years earlier than mammals did.
Unusual fish that walk and breathe air turn out quite differently when raised on land, rather than in water.
The specimen, approximately 560 million years old, contains fibrous bundles that appear to be muscle tissue, an important evolutionary adaptation.
Foot bones more than 40 million years old, from Antarctica, reveal a creature standing more than 6 and a half feet tall.
Study reveals the key factor behind the transformation of theropods into high fliers.
+ Load More