For the first time, researchers have used liquid crystals to create a flat magic window — a transparent device that produces a hidden image when light shines on it. As described in Optica ...

Researchers have used liquid crystals to create a flat magic window -- a transparent device that produces a hidden image when light shines on it. The process for creating transparent liquid ...

Betty Lou Varnum, who hosted the children's show 'The House With the Magic Window' on Iowa's WOI TV for 40 years, died Wednesday.