Whales Walked Around Like Dogs on Land on Four Legs Millions of Years Ago, Researchers Find Evidence. Animals had a past of their own, and much like human evolution, they experienced their cycle ...

Using fossil evidence and genetic dating, geneticists and paleontologists have backed strikingly different candidates for the world's first animal. When you purchase through links on our site, we ...

The speedy, plant-eating creature lived in what is now Colorado roughly 150 million years ago, and its skeleton went on ...

A visualization of Tiktaalik roseae, an extinct aquatic animal with fossils that shed light on the evolution of land animals from marine animals millions of years ago. Nobu Tamura via Wikimedia ...

Fossil claw prints found in Australia were probably made by the earliest known members of the group that includes reptiles, birds and mammals, according to a study published in Nature today 1. The ...

Long before birds, pterosaurs were the first true flying vertebrates. While they are best known for their flight skills during the Mesozoic Era (252 to 66 million years ago), where and how they ...

The 555 million-year-old creature, dubbed Quaestio simpsonorum in a study published Sept. 3 in the journal Evolution and Development, was able to move around on the ocean floor like a "small ...