Some ancient traits were lost and had a major influence on mammal evolution. One of the significant losses among mammal ancestors was gastralia, or belly ribs. Early synapsids like Ophiacodon had ...

The brains of birds, reptiles, and mammals evolved independently, reveal two recent studies. These findings revolutionize our ...

The evolution of marine mammals has reached a fascinating, and somewhat irreversible, point. Dolphins and orcas, once ...

All living mammals today, including us, descend from the one line that survived. During the next 145 million years of evolution, the dominance of dinosaurs ensured that our distant mammalian ...

Now a desert, a team of paletontologists were digging through 30 million-year old rock layers called the Fayum Depression for ...

Scientists have discovered a nearly complete skull of a Hyaenodonta, a hypercarnivore that that lived during the Oligocene ...

Romanes would of course maintain the continuity and identity of the process of mental evolution from its first obscure manifestations in the lower grades of animals up to its highest present point ...

Researchers in Egypt have found a 30-million-year-old skull of Bastetodon, revealing a powerful predator (Hyaenodonta).

Molecular evolution is the area of evolutionary biology ... Around 20% of synonymous sites are conserved in placental mammal genomes, but the evolutionary forces determining this is unclear.