Some of the most influential theories began as seemingly implausible notions. This is not to say that the scientific community embraces every new idea that comes along. Alfred Wegener, the scientist who first proposed the theory of continental drift, learned that the hard way. This video segment adapted from A Science Odyssey chronicles the unveiling of Wegener's theory and shows how compelling evidence is sometimes dismissed when it supports new or incomplete theories.
© 2015 PBS & WGBH Educational Foundation. All rights reserved.