Life on eath is incredibly varied
There is an enormous number of species on this eart scientis are not sure how many but estimates vary from 2 million - 100 milion.
There are also loads of species that have become extinct so since life began a huge number of things have existed on this planet.
The very first living things were simple. Life then evolved to become complex and varied. All living things that exist now and have ever existed evolved from those simple early life forms.
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