|MadSci Network: General Biology|
Tropical rainforest have been around for 400 million years only in the beginning they consisted of mainly Gymnosperms, ferns, clubmoss and horsetails. These were semidecidious plants that grew to 150ft and are responsible for the coal deposits we mine today. Angiosperms - Flowering plants- evolved around 150 million years ago which dominate most of the forest in the tropics today. Records show Civilization was alive in the South American rainforest 40,000 years or more ago. Reference Time Life Books, Nature Library , The Forest .
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