Their hook? They use a unique, hologram-like display technology that kids can actually reach out and touch. Although the Tamagotchi, arguably the first digital pet to catch on with kids ...

Ultrasonic sound waves have been used to levitate objects in crowded rooms to make hologram-like displays. Such acoustic levitation was previously only practical in empty spaces, but a new ...

A heart PET scan is a noninvasive imaging test that uses a small amount of radiation. It helps doctors understand how the heart functions and whether it is healthy. Cardiac or heart PET scans ...