Did you know, that mammals have poorer colour vision than fish, birds and insects? They have 4 colour "channels"; humans have 3.And that the Australian marsupials have colour vision different to primates? They have 3 "channels" but include UV - so what they see is different to what we see.Other mammals have only 2 "channels" - not much colour
and turtles have vision far superior than humans. Turtles can see UV and infrared
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