Asked by: Judith Robinson
Crying is an important behaviour for babies to make sure that they get prompt attention from their parents when they need something. Newborn babies cry for an average of 6.7 hours per day, something that would make an adult become hoarse, lose their voice and eventually develop growths (‘nodules’) on their vocal cords.
Infants have so much endurance because their vocal cords don’t have stiffening ligaments yet, and are packed with hyaluronic acid, which makes them much more elastic and shock-absorbing. A side effect of these adaptations is that babies are unable to accurately articulate sounds, which goes some way to explaining all their babbling.