When early terrestrial animals began moving about on mud and sand 360 million years ago, the powerful tails they used as fish may have been more important than scientists previously realized. (nimbios.org)
For terrestrial animals, physical activity includes climbing and hunting. (morenapethospital.com)
Taken together, these results suggest that early terrestrial animals may have been able to hear sounds when they first stepped onto land, aiding by their newly formed lungs. (sciencemag.org)