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Long Before Trees Overtook the Land, Earth Was Covered by Giant Mushrooms
From around 420 to 350 million years ago, when land plants were still the relatively new kids on the evolutionary b…
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From around 420 to 350 million years ago, when land plants were still the relatively new kids on the evolutionary b…
Concrete is a composite construction material. It is composed of cement and other cementitious materials such as …