There are still a lot of unknowns about exactly how these concussions cause problems inside the brain, but this week scientists described some promising results based on shaking tiny clumps of brain cells in the lab with bursts of ultrasound.

And a preprint paper this week suggests that two-week-old newborn babies can recognise the rhythm of a spoken nursery rhyme, if they're regularly exposed to it in the womb.

Guest: Dr Jonathan Webb, ABC Science Editor

Brainteaser (answer in the audio):    I take a square pyramid and slice a small piece off each of its corners, including the apex.    How many edges are there on the remaining shape?