A groundbreaking discovery by the University of Texas at Austin has revealed $8.4 billion worth of rare earth elements hidden in U.S. coal ash, offering a potential solution to reduce reliance on imports. This untapped resource could transform America's approach to securing critical minerals, turning industrial waste into a valuable asset.!

Maybe you've seen in an episode of a cop show of a suspect getting interviewed in a room. This room probably had a two-way mirror, but what are they? These mirrors work with light intensity, basically...