Babbling babies may be warming up for speech, say scientists

It might sound like a stream of jolly nonsense, but the peculiar sounds babies produce could be an attempt to practise the vocal control necessary for speech, researchers have suggested.
— Read on www.theguardian.com/society/article/2024/may/29/babbling-babies-may-be-warming-up-for-speech-say-scientists

i assumed that this was already established !