Identified from remains found inside fossilized Carboniferous tree stumps, they were small, agile, lizard-like animals. Africa collided with eastern North America in the late Pennsylvanian ...

The Carboniferous Period was from 354 to 290 ... Reptiles evolved as the first land-dwelling animals around the middle of the period, and sharks and bony fishes replaced the jawless agnathans ...

Step back into the Carboniferous period, when colossal arthropods dominated the land 345-290 million years ago. Among these ancient creatures was Arthropleura, a remarkable millipede that ...