How far can sound travel through space, since it's so empty? Is there an echo in space? – Jasmine, age 14, Everson, Washington In space, no one can hear you scream. You may have heard this saying.

But how is it even possible for a sound to exist in space, which is often considered a vacuum? That’s what makes this discovery so fascinating. As we dive into this eerie soundscape, we’ll ...

You hear them as sounds. In space, there is nothing for the soundwaves to travel on. That's why we couldn't hear the alien scream. Sounds are made when objects vibrate. The vibration makes the air ...