Throughout its existence various life forms have inhabited the surface, ranging from the tiniest microbes to creatures so gargantuan that a full-grown eucalyptus tree may seem like a shrub before them - See more at.
Megalodon sharks lived about to 28 million years ago in the Cenozoic Era. People think that the Megalodon is still out there and many think it's still extinct. Out in the ocean it's searched. They saw if Megalodons still exist they live really deep