This is absolutely fascinating. Smell was the first of our senses, and it was so successful that in time the small l...

This is absolutely fascinating. Smell was the first of our senses, and it was so successful that in time the small lump of olfactory tissue atop the nerve cord grew into a brain. Our cerebral hemispheres were originally buds from the olfactory stalks. We think because we smelled. Posted by kottke.