Question: Where do animals come from

Maia Elliott answered on 8 Nov 2018:

Hi Louis and Ethan,
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Animals came from a process called evolution!
Many millions of years ago there were lots of germs living on earth called cells, and nothing else. Then one day, a big cell swallowed a little cell. The little cell stayed alive inside the big cell, and started producing energy for the big cell. This allowed the cell to get bigger. These cells grew and split into two again and again, until they formed groups of identical cells. One day, the cells in the different parts of the group started to organise, so each part of the group could do a different task (like eating, moving, communicating with other groups of cells). Over millions of years the cells got better and better at this, until the groups of cells had things like mouths, legs and eyes – they had become animals!
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And there is a big clue that this is true – you are made of trillions of cells that have identical DNA but different tasks in your body!