A team from Hiroshima University has concluded that the lunar maria (the dark balsaltic parts of the moon) that Asians say resemble a rabbit pounding rice cakes is actually 350 million years older than originally thought. Using an an upgraded instrument, the team was able to analyze particles five-thousandths of a millimeter from stones collected by the US Apollo program.

For more information: http://www.yomiuri.co.jp/dy/features/science/20071207TDY03101.htm