09:18
Making the Pieces Fit: Seafloor Spreading
Alfred Wegener's hypothesis was rejected by many who felt it lacked a credible mechanism which could explain the continental movement hypothesized by Wegener. The notion of seafloor spreading, which suggested that new seafloor develops at oceanic ri...
00:47
Seafloor Spreading: Harry Hess
Geophysicist and geologist Tanya Atwater talks about seafloor spreading, an idea first articulated by Harry Hess that many consider to be the linchpin of plate tectonics.