Path: utzoo!attcan!uunet!cs.utexas.edu!sun-barr!ames!uhccux!matt
From: matt@uhccux.uhcc.hawaii.edu (Matthew McGranaghan)
Newsgroups: comp.edu
Subject: Re: What to know & universal icons
Message-ID: <4660@uhccux.uhcc.hawaii.edu>
Date: 27 Aug 89 21:33:33 GMT
References: <56543@aerospace.AERO.ORG> <19238@mimsy.UUCP> <9059@eerie.acsu.Buffalo.EDU>
Reply-To: matt@uhccux.UUCP (Matthew McGranaghan)
Organization: University of Hawaii
Lines: 20

In article <9059@eerie.acsu.Buffalo.EDU> dmark@joey.UUCP (David Mark) writes:
>  I can think of no creature with 2 eyes for
>  binocular vision that has them arranged one above the other.  If this
>  is generally so, what is the selective advantage of having the plane of 
>  binocular vision perpendicular to the direction of gravity??

I would guess that most things of interest are supported by the ground, and
spread out in the plane perpendicular to gravity.  Then having a broad, 
rather than tall, field of view is advantageous.  I'm not a cat fan, but
don't cats have pupils which increase the vertical axis of the field of view?
To better see game in trees?

Matt McGranaghan
Univ.of Hawaii - Geography

-- 
matt@uhccux                         Matt McGranaghan, Geography Dept 
matt@uhccux.uhcc.hawaii.edu              U of Hawaii, 2424 Maile Way
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