Nearby, a red-rumped agouti — a South American rodent that looks like a large, long-legged guinea pig — scuttled behind a tree trunk. A few feet away, an Arabian sand cat put its paw inside a log to ...

Ever scrolled through social media and seen an impossibly cute fennec fox or a tiny slow loris, immediately wishing you could ...

Crepuscular activity refers to the behavior of animals that are most active during those twilight times just before dark or ...

Light pollution, or artificial light at night (ALAN), is a widespread phenomenon in areas with dense human populations. Normally, animals use natural external cues, like sunlight and temperature, to ...

Night blindness is caused by vitamin A deficiency, congenital mutations, and other eye diseases. Learn about symptoms, causes ...

See animals, stars, and more in amazing detail with these mini night vision binoculars for $89.99.

Nocturnal animals like cats have a tapetum lucidum layer behind their retina, enhancing vision in low light.

While most of the world sleeps, a fascinating group of creatures comes to life — the nocturnal animals that rule the night. Owl monkeys, the only truly nocturnal monkeys, have large eyes for ...

Chinese researchers have developed an infrared contact lens that makes night vision possible. Nanoparticles make the previously invisible light range visible to the human eye.

Lemurs, mostly found in Madagascar, are social animals that live in groups. Many species are active at night or during early morning and evening hours, and their large eyes help them see in low light.

Scientists have unveiled contact lenses that allow people to see in the dark by converting normally invisible infrared light into light they can see.

As night settled across a forest in northeastern India, some “stocky” creatures with “fiery orange” eyes began calling for mates. The calls worked — but also caught the attention of ...