The science pros at TKOR build a crossbow slingshot to demonstrate elastic energy.

Add Yahoo as a preferred source to see more of our stories on Google. To many, the idea of going to the woods, cutting down a tree, crafting a simple longbow, and taking a deer with it is nuts—very ...

The latch is released by a small trigger, just like on a full-size crossbow. The arrows (or bolts, more typically) were made by machining skewers and giving them hard metal tips cut from nails. This ...