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 ...

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 ...

Nocturnal geckos have superb vision in dim light - their eyes are 350 times more sensitive to colour at night than a human's (see for yourself with our animal vision interactive). Lacking eyelids, ...