ow many blondes does it take to change a lightbulb? Just one — and she’s smart enough to know she doesn’t have to spin the ladder or the house to do it. American Ohio State University researcher Jay Zagorsky, PhD, compared data on more than 10 000 14 to 21-year-olds who’d been included in a US Longitudinal Survey and had also taken the Armed Forces Qualification Test, which measures IQ
