A rabbit has 100 million smell receptors
A dog has 220 million
We miserable humans have around 10 million receptorsl
Sharks may be able to track their prey by smell from up to a mile away, following a trail of microscopic particles of protein and blood. Some species can smell one molecule of blood in over one million molecules of water – equal to one drop of blood in a very large size Jacuzzi.
When it comes to smell, we really have taken leave of our senses.