http://www.bbc.co.uk/guides/z9qs4qt A useful guide to understanding evolution.
Fossils are the stone remains of animals or plants that were once alive. Fossils can be the bones of a dead dinosaur or his big footprints in the sand. Usually only the skeletons of animals are left after millions of years. But sometimes a whole animal, like a woolly mammoth, gets trapped in ice.
An educational video about variation, adaptations and evolution.
Selective breeding is also known as artificial selection. It is the process by which humans breed plants and animals for particular genetic characteristics. We have been doing this for thousands of years - ever since we first bred food crops from wild plants, and started domesticating animals about 10,000 years ago.
Unfortunately not the ones with chocolate chips.
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