> I heard somewhere that the reason chickens (which have eyes on
> the opposite sides of their heads, giving binocular vision a
> different meaning) bob their heads up and down is to get a 3D
> perspective.
Check out egrets when they are fishing--definitely triangulating,
maybe refraction-artifact-cancelling.
JPK
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Jacob Pearson Keller
Northwestern University
Medical Scientist Training Program
cel: 773.608.9185
email: [log in to unmask]
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