Hard to imagine, isn’t it? But it’s true. Sharks are older than trees. The earliest known species of tree is Archaeopteris. It was a tree like a plant and its leaves were like a fern. It is extinct now. Fossil index has revealed that it used to exist on Earth about 350 million years ago in a forest in the area where Sahara desert is located at present. Amazingly, the fossil index of sharks has revealed that it was present on even 400 million years ago proving the fact that sharks are older than trees.