"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." For more than 50 years, scientists theorized that an electromagnetic wave could be reflected ...

Taking a picture with a single photoresistor is a brain-breaking idea. But go deeper and imagine taking that same picture with the same photoresistor, but without even facing the object. [Jon Bumstead ...

Physicists have finally confirmed a phenomenon that sounds like pure science fiction: waves that appear to bounce off a sudden change in time rather than a surface in space. The effect, known as a ...