It began in earnest in 1915, when a German geologist named Alfred Wegener first published his theory that Earth's land masses are essentially floating on a molten layer of magma (see How Earthquakes Work). Wege
It was a heady time for the field, in large part because it was so untapped. Meteorologist Alfred Wegener,fueled in partby observations of how South America and Africa had coastlines that looked like they went together and the existence of similar fossils in extremely different parts of the...
From this finding,Wegener developed his floating continent theory. He imagined an original super-continent making up the infant(未成年的)earth, finally the mass broke up into several pieces--the present continents. The continents do seem to fit together like pieces of a puzzle, and what's more...