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Dr. Ken Springer's avatar

Very cool post!

I wonder though about the evolutionary advantage of a freely rotatable head. If most aquatic creatures can already see roughly 180 to 360 degrees around them, it seems like a rotatable head only buys a little extra adaptability - at the cost of the energy needed to move the head.

(I mean, it's great to be able to turn your head and spot a predator, but then you have to manage it while fighting with the predator, or turn it back in the direction toward which you flee.)

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