Exciting to see that the science of smell or olfaction is catching up to what we have discovered.
Besides the Nutrient Test kit we have, I bet there are more than a few of us who could track a string soaked in chocolate!
Thank you, John McGann, for your work which gives us even more reason to believe our noses. Check out the link.
http://www.cbc.ca/news/technology/human-sense-of-smell-compared-to-dogs-1.4106236