The history and development of astrology will be examined at Fiske Planetarium on March 10 and 11. Lecturer Matthew Tearle and graduate student David Beltran-del-Rio, both of CU-Boulder's applied mathematics department, will present the "Science of the Signs" at 7:30 p.m. on both days. During the show, which is intended for a general audience, they will examine the relationship between astrology and astronomy. They also will discuss equinoxes and solstices, and issues regarding setting calendars and timekeeping from the sky.