Homo sapiens,
or humans, exist for 0.2 million year. This period is just a drop in the whole ocean
of evolution.
The first organisms which have appeared were probably unicellular
anaerobic organisms and they have lived around 3,000 million years ago.
From then
to today these organisms have developed into other organisms, including humans.
There is a lot of evidence for this theory, which are the fossils which we
discover every year. This process of evolution is present for a very long time.
All organisms on Earth are still developing and evolving, one reason for this
being better adaptation to their environment. Look at the video, which
illustrates how humans have evolved.
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