 I'm Robert Krulwich from Radiolab. We're told that smell triggers memories in the brain. If you're in your car, let's try something. Roll up your windows and inhale. What do you remember? Like the perfume on a certain person? The favorite dog? A diaper moment, perhaps? There are some memories you cherish and others that just linger. How about contributing this barrel of aroma that is your car to your favorite public radio station? And you might even get a tax deduction.