Some rodents eyes are pink as well.
most likely, it's something to do with the colour of the sclera - that's the 'whites' of a human's eyes.
It is because they cant see very well so their eyes try to take in as much light as possible.
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Conditions for life on earth
(This is for AS environmental studies) could I have reasons for how these factors are important for life on Earth. Thanks.
-distance from sun -tilted axis -mass of the planet -magnetic field -day length