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10 cards from this deck
Remains of living things from millions of years ago
Evidence for evolution by natural selection
Traces preserved (footprints, burrows, root marks)
Hard parts replaced by minerals
Soft tissues preserved in special conditions
No oxygen, no water, low temperatures
No living individuals of a species left
New diseases, new predators, new competitors
Slow environmental changes or catastrophic events
Bones hard & preserve better; soft bodies decay quickly
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