The Silence of Space

Space is completely silent because sound needs air to travel and there's no air in the vacuum of

space. So astronauts floating outside their spacecraft can't hear anything, not even explosions

or their own voices. They rely on radio communication systems built into their helmets that convert

sound waves into radio signals. These signals travel through the electromagnetic spectrum,

not through air, reaching other astronauts instantly. Inside their suits, they can hear themselves

talk because sound bounces around in the oxygen-filled helmet. Without this technology,

two astronauts could be screaming face to face in space and hear absolutely nothing.

Makes you wonder what other movie scenes have been lying to us about space.