Minerals suggest large blocks of Earth’s crust moved around as early as 3.2 billion years ago Modern plate tectonics may have gotten under way as early as 3.2 billion years ago, about 400 million ...
Some great ideas shake up the world. For centuries, the outermost layer of Earth was thought to be static, rigid, locked in place. But the theory of plate tectonics has rocked this picture of the ...
Earth's fractured outer shell is in perpetual motion. While usually imperceptible to us surface dwellers, these pieces of a rocky jigsaw puzzle are constantly crashing together, diving beneath one ...
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