Earthquakes create ripple effects in Earth's upper atmosphere that can disrupt satellite communications and navigation ...

In a breakthrough that challenges conventional physics, scientists have confirmed the existence of “second sound” — a ...

Anyone who has heard an echo (sound waves reflecting off a distant surface ... U.S. Navy Ensign John Gay captured one of the best images ever taken of a sonic boom (the breaking of the sound ...

No sound also means no echo. An echo happens when a sound wave hits a hard, flat surface and bounces back in the direction it came from. By the way, if you were caught in space outside your ...

Fetal echo is short for fetal echocardiogram ... It emits ultrasonic sound waves into your belly that create an image on the doctor’s screen. These sound waves are at a frequency that moves ...