Paddle puzzle: Glenbrook Infants School went to the seaside for our summer outing. We had a nice time, but please can you tell me why the sea is salty. My mum doesn鈥檛 know.
The living dead: On her latest CD, the American artist Laurie Anderson uses the refrain 鈥淣ow that the living outnumber the dead 鈥� 鈥淚s this true? If so, when did it happen? If not, when might it happen, if ever? Do we have good estimates of population numbers before recorded history?
