Alfred Wegener first proposed the theory of continental drift, which suggested that the continents were once joined together in a super continent called Pangaea before drifting apart to their current locations. Wegener's theory was initially rejected because he could not explain the driving force behind continental movement. Evidence that later emerged in support of continental drift includes: matching fossil and rock formations between continents, matching climate zones in pole and equatorial regions, and magnetic pole reversal patterns in ocean floor sediments. This evidence helped prove that continents have shifted positions over time.