Build a monster PVC flashlight that throws a crazy bright beam using a high‑power LED, PVC pipe body, and recycled lithium ...

Ann Makosinski, a young Canadian inventor who competed in the 2013 Google Science Fair, made the Hollow Flashlight that can lit using the heat of a human hand. She used Peltier tiles to capture enough ...

We may receive a commission on purchases made from links. Camping or hiking can be a great way to catch a break, but you'll want to ensure you're adequately prepared for the wilderness by carrying a ...