A baby’s first smile is an exciting moment. But what can it tell us about their understanding of the world?
Boasting about the speed of childhood development is the sport of choice for many a doting parent.
From the 12-week scan right through the early years, monitoring the physical and mental progress of their pride and joy is a source of both excitement and concern.
Especially rewarding is the onset of smiles, squeals and laughter – the kind of milestones that make all the disturbed nights worth it.
But is it all just wind?
Read more: http://www.bbc.com/news/health-24553877