Human bodies use light to help tune their body clocks, and that's true even for some blind people. How does this work? It's a circadian mystery. We mark our days by sunlight. Humans naturally wake up ...

Human brain can process a massive number of light/spectral signals at high speed, partly because it perceives lights as a combination of colors and intensities. However, the existing photodetectors ...

We mark our days by sunlight, with special receptors in our eyes that respond to light and help reset our body clocks each day. This man can't... Perceiving without seeing: How light resets your ...

Every baseball season, 73-year-old Fred Crittenden plants himself in front of his television in his small one-bedroom apartment an hour north of Toronto. "Oh, I love my sports — I love my Blue Jays," ...

We mark our days by sunlight. Humans naturally wake up in the morning and fall asleep at night because our eyes use light to help tune our bodies and our clocks. Next in our science series Finding ...

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