Can you guess how life arrived on Earth? Earth is estimated to be about 4.5 billion years old, and for much of that history it has been home to life in one weird form or another.
Really some scientists think life appeared the moment our planet’s environment was stable enough to support it.
First proof of life on Earth comes from fossilized mats of cyanobacteria called stromatolites in Greenland that are about 3.7 billion years old. Ancient as their origins are, these bacteria (which are still around today) are already biologically complex—they have cell walls protecting their protein-producing DNA, so scientists think life must have begun much earlier. In fact, there are hints of life in even more primeval rocks: 4.1-billion-year-old zircons from Western Australia contain high amounts of a form of carbon typically used in biological processes. [7 Theories on the Origin of Life]
But despite knowing approximately when life first appeared on Earth, scientists are still far from answering how it appeared. The development of living beings on earth again has its own history. Is it really true that human beings came from forest man?
Guess, how was the primitive life? What the living beings used to struggle for their existence ? There are many books written on this topic and only our old people talks about the history of primitive life and young think it is like fairy tales. Here below is a video trying to picture out the primitive life and the old age.