What was Larry Summers thinking? The Harvard president, as well known for his brilliance as for his tactlessness, must enjoy the taste of shoe leather, given the frequency he puts his foot in his mouth. Some "off the record" remarks he made at a research meeting of the National Bureau of Economic Research got him excoriated in the electronic and print media. Summers' notion that the scarcity of female scientists at elite institutions might stem from some "innate" difference between the sexes is simply amazing.The data just doesn't correlate. The number of women earning doctorates in engineering and science has risen significantly since 1966. According to a trio of college presidents--Drs. John Hennessey of Stanford, Susan Hockfield of MIT and Shirley Tilghman of Princeton, women went from getting nearly no engineering degrees in 1966 to 16.9 percent in 2001n