Science Sex pheromone named after a character in Jane Austen's "Pride and Prejudice" changes mice brains Mark Frauenfelder
History Our olfactory heritage: researcher preserves scents before they're lost forever David Pescovitz
drugs Marijuana pulled from man's nasal cavity 18 years after he snuck it into prison David Pescovitz
cooties Our brains tell us to avoid people who are sick, even when they don't show obvious symptoms Mark Frauenfelder
Stress makes us work harder for pleasurable rewards, but doesn't make us appreciate them more Xeni Jardin