Re: MR's comment on dino vision

["Joyce E. Green" <JEBGREEN@geode.umnh.utah.edu>]

<Snip>
>
> [ dinosaurs probably had better color vision
>   than most mammals and may have been sensitive to optical polarization
>   as well.  The latter would be particularly helpful in allowing an
>   animal to see under the surface of the water because the polarization
>   of reflected light would be different from the polarization of light
>   transmitted from under the water's surface.  -- MR ]

How can we know *anything* about dinosaurs' color vision &/or
sensitivity to optical polarization?
 ...Joyce

[Mickey will be away for the next week and will not see this until he gets
back - Chris]