These tree-size lycopods or club mosses are notable for their scale-like bark. From the base upward the plant was anchored in shallow soil by several "Y"-branch rooting organs called stigmata. These had spirally arranged, finger-size roots coming from them. A pole-like trunk, unbranched for most of its length, and up…

Carcharodon Megalodon The Megalodon Shark became extinct at the end of the Pliocene Era, 1.5 million years ago. Sharks will go through about 20 thousand teeth in its lifetime. This tooth is among the largest found and came from a 50 foot Megalodon that lived about 20 million years ago.…