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Evolution

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Reconstruction of a landscape during the Triassic period (about 250 to 200 million years ago). Trees, mammals and birds didn't exist, while trilobites and eurypterids had disappeared long time ago. You can see dinosaurs. They will disappear in about 50 millions years. You can also see insects and ferns, that still exist today.

The word "evolution" means change and development.

When we use the word "evolution", we normally mean changes in living things over generations (biological evolution).

Evolution is what leads to living things changing over time. New species may appear, and others may disappear.

Living things haven't always been here on the Earth.

Life appeared at some point, and then started to evolve.

The theory of evolution is the explanation for how and why the forms of living things change over time.

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