100 Greatest Discoveries: Continental Drift
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Groundbreaking research by Alfred Wegener reveals that all the continents were once connected as one single land mass he called Pangaea. Learn more about Wegener's continental drift theory on The... (more info)

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Why Tell Me Why: Why Pangaea Broke Apart

Why Tell Me Why: Why Pangaea Broke Apart (1:31)

Why Tell Me Why: Why Pangaea Broke Apart

Why Tell Me Why: Why Pangaea Broke Apart (1:31)

G Word: Tidal Power

G Word: Tidal Power (2:39)

G Word: Tidal Power

G Word: Tidal Power (2:39)

Destroyed in Seconds: Sand Dune Disaster

Destroyed in Seconds: Sand Dune Disaster (1:52)