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Bacteria in water eventually evolved into marine creatures such as jellyfish. After a very long time, jellyfish evolved into fish.
After even more time (millions of years in fact), fish learnt how to get around on land to catch insects. Eventually this led to them growing legs so that they could walk on land and swim in water, these were the first amphibians.

Eventually after many more millions of years, these amphibians evolved into reptiles. As time went on, the reptiles slowly evolved into dinosaurs.

The whole process took millions of years.

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10y ago

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