loflo69 / Shutterstock Babies, like tiny feral animals, learn with their mouths. It’s one of the earliest forms of problem-solving: Does this hand/iPhone/Cheerio taste good? What’s its texture? What does it do? But babies also use their mouths to learn even when they aren’t putting foreign objects into them. In a study published earlier this week in the journal Proceedings of the National Academy of Sciences, a team of audiology and psychology researchers from the University of British Columbia established the first direct link between babies’ oral motor skills—the movement of the tongue, lips, and other parts of the mouth—and their ability to understand speech.