although with a pulse rate of 1/ppm and wavelength of 694nm, they're not really a candidate for crowd scanning
Originally Posted by
Eidetic
Me too. All the recent uproar about class 4 lasers in the hands of hobbyists, but here's an article about building one with a ruby from Popular Science in 1964.
suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.