A peacock feather in sunlight shifts from blue to green to bronze as you turn it. Photograph it, and this shimmer collapses ...

For most of human history, green eyes didn’t exist. Understanding why they do now means rethinking what we know about evolution itself.

Gray and green eye colors are the rarest in the U.S., although extremely rare red color can occur with albinism. Eye color is determined by the amount of melanin in the iris, with more melanin making ...

If you are fortunate enough to have a ticket to an event at Madison Square Garden in New York – say, an NBA Finals game – one ...

The work addresses a gap in biometric testing, as NIST’s IREX has focused primarily on closed-source commercial iris ...

One of the easiest avenues you can take to achieve cooler outfits is to experiment with color. Fashion people and well-dressed celebrities are well aware of this and frequently experiment with ...

Purple doesn’t actually exist in the visible light spectrum because it’s a nonspectral color created when your brain compensates for the conflicting signals from red and blue wavelengths hitting your ...

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