jan 1, 1900 - Alfred Wegener-1912 Harry Hess-1962 Emil Wiechert-1897 The hypothesis of continental drift.
Description:
This theory proved that 335 million years ago all of earth's continents formed together to create a large landmass called "Pangea" and about 300 million years ago that huge landmass broke apart forming the earth's continents of today.publish.illinois.edu
Added to timeline:
Date:
jan 1, 1900
Now
~ 126 years ago