This post is about the history of life on earth. No one knows how life came on earth, there are lot's of kinds of theories of how life came on earth. Animals evolve and they change, like before we were ape like creatures (but some theories say that we came from apes) but we were smarter than apes. We kept on getting smarter. When we discovered fire, we started getting less hair. Before our skulls were different, one difference is that we used to have bigger skulls, another difference is that the back of our skulls used to be more pointy. Before we were shorter because they used to use their hands to walk but then we started to use two legs. Before we were a fish like creature then we started becoming a reptile like creature then a monkey like creature then a ape like creature, then after that is humans.

Proconsul

Sharks have been on earth for a long time, one of the early sharks is called the Akmonistion. It has a weird lump on top of it's head. Another type of early shark is called the Striatolamia, they have big teeth (if you search Striatolamia, you will find a lot of pictures of Striatolamia's teeth ). Another type of early shark is called Lissodus, it has flat teeth that are used to eat clams. Another type of early shark is called Ptychodus, it is about thirty two feet long. Early sharks were really similar to early fish because some of the fishes evolved into sharks, reptiles also evolved from fish. One of the early reptiles looks like a fish with legs, tadpoles are like tiny fish but they become frogs that do not really look like fish. A lot of types of animals evolved from frogs, even though some don't look like them.

Flatworm

Plesiadapis

The first living organisms on earth is bacteria. I think bacteria evolved into fish, then they evolved into reptiles, then they evolved into mammals. Before when we were ape like creatures, I think we were stronger because we did not have any weapons,but when we had stronger weapons we were starting to get weaker. We do not have to be that strong because we have weapons, we where also stupider when we were ape like creatures. We are a lot smarter now and we do not really need to evolve anymore because we are already smart enough. We figured out how to make a car, we can make a lot of stuff but before we could not. We would even live in the caves, but now we are living in houses that are man made. Before we could not build a house, we could not build that many stuff that we can build now.

Flatworms are one of the earliest type of animal with a brain. Flatworms are one of the simplest animals with organs and they evolve into humans. Flatworms live in the ocean, there is a picture of a flatworm in this post. Another animal that evolved into humans are the Plesiadapis. They are one of the oldest known primate-like mammal species, they are small, they are also extinct. There is a picture of a skeleton of a Plesiadapis on a branch. Proconsul are also evolved into humans, they have a weird feature because they had a mixture of old world monkey and ape characteristics. Their skeleton looks like a monkey skeleton but without a tail. Proconsul are extinct, there is a picture of a proconsul skeleton on some branches in this post. There are a lot of animals that evolved into us, it took a really long time to evolve from a cell to a human.

The Australopithecus afarensis is an ape like creature that evolved into humans. They are a little bit bigger than humans, they also have a smaller brain than humans. The homo habilis is another ape like creature that evolved into humans, the homo habilis was discovered at nineteen eighty six by Donald Johanson and Tim White. The homo habilis had a human like skull but it was still a little bit pointy. The homo erectus on the other hand is a human like creature that evolved into us, they just look like a human but they are stronger and they are also have more hair than us. The homo heidelbergensis is another human like creature that also evolved into us, they are also stronger and more hairy than humans, you can sometimes find some of their hand axes. After the homo heidelbergensis is actually the humans.