Fathers of the zodiac tracked downAstronomer shows when and where his ancient counterparts worked. Geoff Brumfiel The MUL.APIN tablets record the dates that constellations appeared in the Assyrian sky. R. D. Flavin Using modern techniques — and some rocks — a US astronomer has traced the origin of a set of ancient clay tablets to a precise date and place. The tablets show constellations thought to be precursors of the present-day zodiac. The tablets, known collectively as MUL.APIN, contain nearly 200 astronomical observations, including measurements related to several constellations. They are written in cuneiform, a Middle-Eastern script that is one...