3 min read The Carboniferous period, part of the late Paleozoic era ... agile, lizard-like animals. Africa collided with eastern North America in the late Pennsylvanian, an event that formed ...

the Carboniferous period saw a boost in atmospheric oxygen and vast quantities of carbon dioxide trapped in what eventually became Earth's coal deposits. Terrestrial plant and animal life ...

Scientists have found ancient nail tooth shark fossils deep inside Mammoth Cave in Kentucky, revealing new information about ...