The two sorts of brain look different, too. Stutterers tend, for instance, to have more densely packed grey matter in the areas associated with processing and producing sounds.
The researchers say this is the first time anybody has pinpointed a part of the brain necessary for generating the sorts of memories needed to mimic sounds.
Things that generate sound in the water can interfere with a whale's ability to hear and can do a masking effect on their ability to communicate with other whales.
The prize activity of GeneDupe's newly created botanoacoustics division, however, is its work on the flip side of the matter-sound generation by plants.
They advanced around the corner again, shaking the Clankers, and the noise echoed off the rocky walls, grossly magnified, so that the inside of Harry's skull seemed to vibrate with the den.