The eyes of insects are very different than those of mammals like humans. Nevertheless, they serve their owners well.
Suppose your ancestors had lived in darkness for almost a million years. This is the world of the Mexican blind cavefish.
Vision may not involve creating an inner model of the world in the brain.
How tiny stones inside our heads tell us which way is up...
Green sunfish can see quite well in water that is thick and murky. How?
While you may not poor vision, you probably have experienced inattentional blindness.
Thanks in part to the wonders of modern medicine, people are living longer than every before. Living to a ripe old age does have its drawbacks, though.
Not only are 8% of men colorblind, but even compared to men who can distinguish between reds and greens, many women may live a more colorful existence. That’s because about 40% of women possess two types of so-called red cones, a key gene involved in enabling one to see the color red. Learn more on this Moment of Science.
The sad truth about aging, on this Moment of Science.