A 15-year-old girl has invented a flashlight that produces a usable amount of light just by using the heat from your hand. And if the judges at the Google Science Fair like it, she may be on her way ...

We may receive a commission on purchases made from links. When people shop for military flashlights, they're usually looking for a flashlight that covers several key features. Those aspects include ...

Growing up, my dad always made sure we had a flashlight at home. “You’ll need this in case an emergency happens,” he’d say. And with an extra level of caution ...