Photo: Hammerhead Sharks Have "Human" Vision



The distinctive T-shaped heads of hammerhead sharks (above, a great hammerhead shark swimming in the Bahama Islands) gives the predators human-like stereo vision, making it easier for the animals to track speedy prey, a November 2009 study says.

But the sharks pay a price for their advanced vision: The odd fish have a large blind spot directly in front of their heads.

Photograph by Brian Skerry, NGS


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