A shooter kills 2 at a Northern California library and an 18-year-old suspect has been arrested

A shooting at a library in Northern California left two people dead and an 18-year-old suspect has been arrested, police said ...
Smithsonian Magazine

The Supermarket Scanner Changed the Way We Buy Groceries Forever

A Spectra Physics Model A supermarket scanner—one of the first ten ever produced. A laser within the unit projects a beam onto a mirror that redirects it through the glass plate on the top. Cade ...