Asked by: Dan Bradshaw, Cheltenham
Baby talk or 'motherese' is nearly universal in human cultures and also found in Rhesus monkeys. It is characterised by generally higher pitch, greater pitch variation and a more musical rhythm and tone. Research has suggested that this exaggerated emphasis may help infants learn the sound patterns to develop speech or increase attention when parents are warning of dangers.
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.
