How is she able to do this?
She goes weekly, along with about a dozen or so other children of her age to swimming lessons, but nobody taught her the necessary skills to survive underwater; she was born with them. And this is the fascinating bit. Somewhere in the long evolutionary history of our species it was necessary for new born babies to be able to survive in the water and consequently a whole suite of related behaviours became genetically imprinted: holding breath, opening eyes, moving in a rudimentary dog paddle, seeking the surface, grasping. Desmond Morris theorises that our species was, for a period of its development, aquatic; that our lack of body hair, the distribution of our sub cutaneous fat and these particular instincts point to a time when we spent much or even most of our time wading or swimming. Other palaeontologists note the behaviour of the great apes when they are in water and speculate that the necessity to wade in some ancient time of great climate change led to the development of our upright stance. Who knows? but it makes sense to me. At only a few weeks old Naomi (and of course other babies) will startle and splutter and look concerned if water is splashed in her face, but will emerge from complete immersion without the slightest trace of concern but with, to the contrary, every sign of enjoyment.