Ronn!Blankenship <[EMAIL PROTECTED]> wrote
... some types of birds have five types of cone cells, suggesting
that they can see colors we can't.
Can you tell us more? This is deep.
As far as I know, humans see by comparing the total and differential
inputs from three types of cell, each with a different frequency
response. Am I right about this? I know little about biosystems.
>From what you said, one possibility is that birds see further into the
infrared and ultraviolet than humans; another is that birds see within
the same frequency range (colors) as humans, but distinguish more
colors. Which is it?
If it is a combination of the two, what are the
wavelength/frequency/color ranges of the five types, and what does
that imply for humans?
--
Robert J. Chassell
[EMAIL PROTECTED] GnuPG Key ID: 004B4AC8
http://www.rattlesnake.com http://www.teak.cc
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