Frogs can indeed scream, and this high-pitched screech is an incredibly smart defensive tool against predators.

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.

Narrator: Does this scream sound familiar? That's because it's used in over 100 films. It's a movie trope called the Wilhelm Scream. Jonathan Kuntz: The Wilhelm Scream is maybe the most famous ...

Why can't we hear this alien scream in space? And have you ever wondered, when you make a sound, like, ooooooooooooo, how does the sound actually get into your ears? Watch what happens when the ...