Human eyes are actually spheres. The part that we can see is only just the front. That coloured circle is called the iris and the black spot in the middle is the pupil. This is the part of the eye ...

We can only understand their evolution when we learn to see the world through them. Our eyes evolved through natural selection—but human ingenuity can perform wonders. With the aid of a retinal ...

But packing pixels is necessary only for up-close viewing. A digital billboard can have fewer pixels than a smartphone yet still appear seamless from afar because the human eye can’t perceive ...

When evolution skeptics want to attack Darwin's theory, they often point to the human ... an eye lived about 550 million years ago. And, according to one scientist's calculations, only 364,000 ...

The colors of the rainbow are all around us, but so are hues that most of us can't see, including ultraviolet — a wavelength that eludes many humans but ... whether your eyes contain UV ...

If I use 1 arcminute instead, the scale factor is smaller, about 3438. So let’s convert that to inches to see how small a pixel the human eye can resolve at a distance of one foot: 12 inches / 3438 = ...

Photo: Jueqian Fang Strangely alluring erotics also emanate from small groups of near-identical, scantily-clad women, of whose own eyes viewers can only see white ... view in the human tableaux ...

They are far more sensitive to light than cone cells, which is why you can sometimes see stars out of the corner of your eye at night, but when you look straight at them they seem to disappear. 5.