What do you spy with a horseshoe crab eye?

What advantages do horseshoe crabs have with their compound eyes (1000 tiny lens less than 1/10 of an inch in diameter)?

Discovery Education produced this video on how horseshoe crabs see as a part of the Science Investigation series. Watch to see how Dr. Robert Barlow from Woods Hole Oceanographic Institute uses a CrabCam to get a glimpse into what Limulus polyphemus detects underwater and why it’s a useful view of the world.

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  1. A story as old as the dinosaurs and all the wisdom they inherited!

  2. Lovely creatures. My family participates in our state’s count every year and I still get such a thrill out of spotting every single ‘shoe.

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