Over 70 years ago, Roald Dahl proposed that plants could scream in a fictional story called The Sound Machine. He suggested they could shriek — a high-pitched shriek undetectable to the human ear.

In space, no one can hear you scream. You may have heard this saying. It’s the tagline from the famous 1979 science fiction movie “Alien.” It’s a scary thought, but is it true? The simple answer is ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: FX / Hulu "In space," some marketing genius once said, "no one can hear you scream".

The odd sounds, from yelps to warbles and even screams, are also increasing the risk of collisions at night, say experts.