Magnetic Clues in Australian Rocks Suggest Plate Tectonics Began Over 3 Billion Years Ago
Without plate tectonics, our planet wouldn’t have continents, mountains, and possibly even life itself. New evidence suggests this geological process began at least 3.2 billion years ago, a surprisingly early origin. Geologists debate exactly when our planet’s tectonic plates began to shift. Estimates vary wildly, ranging from 4 billion to 1 billion years ago, with…
