In the late 1700s, while inspecting a coal mine in southwest England, a young surveyor named William Smith noticed a surprising pattern: from one location to the next, rock layers (or "strata") were ...
The story of Earth is the story of change. The 4.5 billion years of this planet’s history saw it transformed from a hellish world of magma oceans and poisonous air to a temperate, habitable home ...
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