Mammals’ daily schedules — how wildlife activity is spread over a 24-hour cycle based on light availability — are grouped into four categories known as a diel phenotypes, said Humberto Perotto, Ph.D., ...

Pantolambda bathmodon, a stocky, now-extinct mammal, lived 62 million years ago and reached roughly 92 lbs in adulthood, which was a much larger size than most mammals that came before.

Jellyfish are among the oldest animals on Earth ... and influences transitions between different life stages. The complex life cycle begins with tiny larvae that settle on solid surfaces and ...

By having open and honest conversations no matter how old our "children" are, we best prepare them for not only life away from home but also for the rest of their lives. References Center for ...

Mammals evolved for land life before the asteroid impact, evidence shows The research provides evidence that most mammals had already started to evolve to live on land much earlier than the ...