At first, this looks like a simple drop from a tall structure. But stacking balls changes how energy moves at impact. Dropped from nearly 150 feet, the lower ball transfers force upward instead of ...

An 880-pound vending machine is dropped from nearly 148 feet onto a reinforced trampoline. At that weight, even small movements create massive force. The trampoline absorbs the impact briefly before ...

According to the patent, habitable modules would rotate around a central axis to simulate gravity for crew by producing an outward-pushing centrifugal force. When you purchase through links on our ...

Discovering a machine that could somehow produce thrust without releasing propellant would be a game-changer for human space travel. There’s just one problem—such a device would defy the laws of ...

Before there were slide locks, liner locks and frame locks, there were friction folders. This type of knife has no lock at all. Instead, it has an extended tang that, when open, sinks between the ...