Finally, a tube in the side of the glass releases gases with different smells, such as lime, that change the perceived flavour even more. (newscientist.com)
The human nose is actually much better than most people think it is, and humans can distinguish thousands of different smells even in minute quantities. (stephsdogtraining.ie)
Let alone the anxiety these pets can experience from being in a strange place with many different smells. (ontariospca.ca)