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Understanding evolution: Using fossils
Fossils help us study the evolution of today's plants and animals
Fossils show us the sites of ancient seas, lakes and forests
Fossils even record ancient climates
Over billions of years, countless organisms - from tiny
bacteria to giant trees - have become fossils
People didn't always know that fossils were relics of
once-living organisms--and they had no idea
how old fossils could be. Early scientists thought
fossils grew from seeds dropped by stars, or
were carved from stone by ancient, unknown artists.
