A predator that swam Earth's oceans more than half a billion years ago is unlike any creature that lives on our planet today.

Slight variations in a person's pulse rate could give clues about the likelihood of future cognitive decline, according to a ...

In small doses, boredom is the necessary counterbalance to the overstimulated world in which we live. It can offer unique ...

Your eyesight might be good enough to confidently read the tiny text at the optometrist from a few meters away.

The bacteria that live on your skin could be playing a role in protecting you from the sun's harmful UV rays, scientists have discovered.

First, light passes through the optical components of the eyes such as the cornea, pupil and lens. Together, they help focus the light onto the retina that senses light, while also controlling the ...