Leaving your desk for a few minutes? On Windows, press Windows key + L to lock your screen without closing anything. On Mac, press Control + Command + Q. It’s a good habit to get into and much faster ...

The speed of the world’s first supersonic artillery shell, the Sceptre TRBM 155HG. It can hit targets up to 100 miles away with 5-meter accuracy. That puts it well outside the reach of most jamming ...