Coal balls are spheres of plant material that were fossilized over 300 million years ago in the Pennsylvanian Period. These specimens were formed in lush environments with flowing sources of ...

The fossil site, called Lantern North, dates to approximately 320-318 million years ago during the early Pennsylvanian period ...

Clubmosses, as the earliest vascular plant group, have leaves with only a single vein of xylem down the middle, in contrast to the more complexly veined leaves of trees and even ferns. Nevertheless, ...

430 million years ago, towering life-forms known as Prototaxites emerged from the ground, reaching heights of up to 26 feet and growing trunks up to 3 feet wide. When the first Prototaxites fossil ...