Alfred Wegener (theory of continental drift)

Alfred Wegener was a scientist who proposed the theory of continental drift, suggesting that Earth's continents were once joined together as a supercontinent called Pangaea. Over millions of years, these continents slowly moved apart to their current positions. He based his idea on matching coastlines, similar fossils found on different continents, and evidence of past climates. Although initially controversial, Wegener’s theory laid the foundation for our understanding of plate tectonics, explaining how Earth's surface reshapes over geological time through the movement of large crustal plates.