radiocarbon dating

Plaster from human dwellings or the signs of a long-abandoned animal enclosure? Tuesday's New York Times describes the collaboration between a chemist - structural biologist Prof. Steve Weiner, who is head of the Helen and Martin Kimmel Center for Archaeological Science at the Weizmann Institute - and American archaeologists. From China to the nearby site of biblical Gath, Weiner and his team have been applying the methods of advanced chemistry to solving riddles of the ancient world. (The answer, at least for the dig at Ashkelon, is fecal and decayed plant matter, meaning the apparent palace…