Quote from the article One of the best available data sets on left-handedness comes from a scratch-and-sniff survey of olfactory ability mailed out to millions

Quote from the article One of the best available data sets on left-handedness comes from a scratch-and-sniff survey of olfactory ability mailed out to millions of National Geographic subscribers in the 1980s. Go ahead and read that sentence again — it doesn't get any less weird the second time around.