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MPEG-1  |  2012-12-18  |  9.1 MB  |  352x240  |  29.97fps  |  1 minute, 2 seconds
Transcription: When most people see ocean waves, like the waves you're seeing in this video from South Africa, they think that the waves carry water along with them. They do not. Waves do not transport water. They transport energy through water. If you look at the algae floating in the water, you'll get an idea of what I mean. Notice that as the wave comes through, the algae don't move forward very far. That's because the water's not really moving very far. It's moving in a circle. As the wave passes through, the algae simply move up and then move down. Now when the waves approach the shore, something a litt ...