Understanding green's position in the spectrum of visual light is required to understand how night vision goggles work.

Contrary to popular belief, most property crimes—including burglaries and package theft—happen during the day, not under cover of darkness. But night still brings unique challenges: fewer people ...

There was once a time when night vision goggles -- with their almost magical ability to see in the dark -- were only available to the military and law enforcement. Today, that technology is so ...