Early Evidence of Continental Drift
Geophysicist and geologist Tanya Atwater points to the jig-saw puzzle fit of Africa and South America as the most obvious evidence supporting the theory of continental drift.
Post-World War II Oceanography
Geophysicist and geologist Tanya Atwater talks about technology developed as part of the war effort in the 1940's that would prove critical in the formulation of plate tectonics theory.
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.
Seafloor Spreading and Plate Tectonics (Part 1)
Geophysicist and geologist Tanya Atwater talks about the role of seafloor spreading and spreading centers in the plate tectonics process.
Seafloor Spreading: Vine and Matthews
Geophysicist and geologist Tanya Atwater talks about work done by Fred Vine and Drummond Matthews that ultimately provided proof of seafloor spreading by tracking the patterns of magnetic striping on the ocean floor.
Differences Between Oceans and Continents (Part 1)
Geophysicist and geologist Tanya Atwater talks about the very different ways in which oceans and continents are formed and how each changes over time.