|
Fossil Shark Teeth |
| A Short History of Time |
| ERA | YEARS AGO | WHAT HAPPENED |
| PRECAMBRIAN |
OVER 4.5 BILLION 1.5 BILLION |
THE EARTH'S CRUST FORMS. BACTERIA AND ALGAE FORM. |
| PALEOZOIC |
600 MILLION 440 MILLION 300 MILLION |
MARINE INVERTEBRATES APPEAR. AIR BREATHING ANIMALS AND SHARKS APPEAR. SWAMPLANDS AND REPTILES DEVELOP. |
| MESOZOIC |
299 MILLION 71 MILLION |
VOLCANIC ACTIVITY. DINOSAURS APPEAR. DINOSAURS, GIANT REPTILES DIE OUT. |
| CENOZOIC |
70 MILLION (Paleocene) 53 MILLION(Eocene) 37 MILLION(Oligocene) 26 MILLION(Miocene) 12 MILLION(Pliocene) 2 MILLION(Pleistocene) |
MEGALODON PROGENITOR IS Otodus obliquus. Otodus EVOLVES SERRATIONS. MEGALODON PROGENITOR BECOMES C. auriculatis MEGALODON PROGENITOR IS: C. angustidens. MEGALODON PROGENTIOR IS: C. chubutensis. EXTINCTION OF: Carcharocles megalodon. |
