High in the Italian Alps, concrete towers stand silent — once part of a secret network built to jam enemy signals during the Cold War. Now abandoned, they remain frozen in time above the clouds.

Using high school trigonometry combined with knowledge of four-quadrant multipliers to form a frequency quadrupler.

Vibration plates have been rumored to help you get stronger and lose weight at the same time. Here's the truth. Taylor Freitas Contributor Taylor Freitas is a freelance writer and has contributed to ...