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.

The research shakes up what most botanists thought they knew about the plant kingdom, which had been considered largely silent, and suggests the world around us is a cacophony of plant sounds, said study coauthor Lilach Hadany.

She said she had long been skeptical that plants were completely noiseless.

Check out the rest of this amazing story at this CNN link.