(CNN) — Plants make popping sounds that are undetectable to the human ear, according to recordings made in a new study — and they make more sounds when thirsty or under other kinds of stress. She said ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.View full profile Rachael has a degree in Zoology ...

2. The Secret of the Popping Sound We’ve all done it, sitting idle, stressed, or just bored, we twist our fingers till they pop! Some find it relaxing, others find it annoying. But have you ever ...

If you've ever heard your knees pop when you stand up or noticed a cracking sound in your back as you stretch, you’re not alone. These sounds, medically known as crepitus, are common and usually ...