Explains continental drift and why it happened and why it's still happening after billions and billions of years. Continental drift is related to, but isn't, plate tectonics which also are associated with the Earth's land masses moving around. Earth's landmasses are still moving and are going to continue to move for millions of years.
Mr. Andersen describes how plate tectonics shapes our planet. Continental and oceanic plates are contrasted and major plate boundaries are discussed.
January 6, 1912 the German meteorologist Alfred Wegener presented in a public lecture his ideas of former supercontinents breakups and moving continents.
Fifty years on from a groundbreaking paper, geophysicists have progressed from believing continents never moved to thinking that every movement may leave a lasting memory on our planet.