Ah, I don't mean that it's silly to use the sense of smell, just that it
created an amusing image in my head of undergraduates play acting
as bloodhounds or similar.
According to the "QI" book which I've pinched off my dad "The most
recent research on noses, incidentally, shows that we use each of
our two external nostrils* to detect different smells, breathing different
amounts of air into each to create a kind of nasal stereo."
The web page of Noam Sobel (the chap who did the research mentioned
in the article) says something similar: "We have shown that because airflow
is slightly different in each nostril, each nostril is in fact hyper tuned to better
perceive different odorants. In other words, when humans take a sniff, each
nostril conveys to the brain a slightly different olfactory image. "
*The book says we've got four nostrils, two we can see and two we can't.
Who am I to argue?
