From Freya Smith, Mosgiel, New Zealand
Anil Ananthaswamy suggests we are born with a sense of quantities – such as size and density – that correlate with the number of things (2 September, p 33). When I am counting $20 bills I say “da, da, da, da, one, da, da, da, da, two…” so count to 10 to tally $1000, or I lose track.
Obviously, this requires knowing the arithmetic, but it still seems to me that rhythm and number are intimately connected.
