An experiment at Berkeley forced undergraduates to track chocolate through a field while blindfolded and crawling on their hands and knees. The good news? They proved that humans can use our noses for tracking. The bad news: video of the experiment is undoubtedly on a fetish site somewhere.
There are sound evolutionary reasons why we have two eyes and two ears. By why do we have two nostrils? Researchers at Stanford University have the answer - after doing a study that revealed the weird reason why we don't have one big hole in our nose.