Smell for thought

Here is something to mull over. I recently read that in order for us to smell something, actual molecules of the thing we are smelling need to enter our nose. I did not know that! I mean, I knew that our nose interacted with the source of the smell in some way - but I did not imagine the connection would be quite so close as this. Interesting, huh?

Now, try to not remember this the next time you smell the spoilt milk or the stinky socks or the garbage or the ...