Last year I took my twelve-year-old daughter to see Lake Mungo. We talked all morning about ancient lakes and Aboriginal camp sites but looking at the saltbush she could not make the jump. Standing on the lunette, her keen eyes picked out a tiny crenulated piece of bone amongst the drift sand. Less than ten millimetres long it was a fish otolith, part of the bony structure of the inner ear, its sh ... (read more)