The presence of the tapetum can be observed at night when a pair of glowing eyes reflects back a flashlight or some other light source. (Interestingly, different animals have different color ...

presumably because color vision is less important at night and because cones are most effective in bright daylight. If the benefits of seeing dwindle to none, some animals lose their eyes altogether.

Seeing through one eye or many, in technicolour or black and white, few animals experience the world as we do ... But because rod cells only have a single light-sensitive pigment, at night we see in ...

The presence of the tapetum can be observed at night when a pair of glowing eyes reflects back a flashlight or some other light source. (Interestingly, different animals have different color ...