For many people, spotting blood in the urine is often the first warning sign of bladder cancer. But for those with color ...

Some forms of colorblindness may actually afford enhanced perception of some colors, according to findings reported this week in Current Biology by John Mollon and colleagues at the University of ...

Anyone with normal color vision agrees that blood is roughly the same color as strawberries, cardinals and the planet Mars. That is, they're all red. But could it be that what you call "red" is ...