Evolution of the hammerhead shark

The hammerhead shark is considered the new kid on the block having appeared only about 40 million years ago. No one however, knows how they happened as sharks leave only the head and teeth as fossils because the rest of the body is cartilage. This is the evolution of the hammerheads by BBC.

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Channels: Ecology

Tags: Hammerhead shark evolution BBC

Uploaded by: ( Send Message ) on 26-11-2011.

Duration: 3m 14s