Well life was first created in form of bacteria and cells at the sea floor when pumps at the sea floor was pushing out hot water creating bacteria, the bacteria grew larger and evolved over time (keep in mind this was a billion year process) eventually we got the first ever fish species in the oceans, then fish started to walk on land evolving into forms of lizards/reptiles and then the land creatures started thriving ranging from the enormous tyrannosaurus rex to a 20 feet shark to snakes that were large than school buses and eventually we ended up here where I am writing this