In most parts of the natural world, eyesight is key. Animals use it to find food, escape danger, and move around. But in some ...

The new leech species has three jaws, five pairs of eyes aligned in a U-shape, a disc-shaped “caudal sucker” for attachment, ...

Leopards are famous for their powerful night vision on Earth, but would those same eyes function in the pitch-black vacuum of ...

In a dark, damp cave in southeastern China ... The new leech species has three jaws, five pairs of eyes aligned in a U-shape, a disc-shaped “caudal sucker” for attachment, and a long conical ...

In a dark, damp cave in southeastern China ... The new leech species has three jaws, five pairs of eyes aligned in a U-shape, and a long conical body that changes size and shape depending on ...

A new study unveils the potential reason children participated in creating prehistoric cave art. In prehistoric societies, ...

This adaptation process, called dark adaptation, happens automatically throughout your life. As a teenager or young adult, your eyes could fully adjust to darkness within about 20-30 minutes.

A team of explorers rappelled into the shaft-like cave and found a “pinkish” animal living in a cold river of the “deep dark zone.” Take a look.