The area of the olfactory epithelium (red) in dogs is some forty times larger than in humans. Mice – the species Axel and Buck studied – have about one thousand different odorant receptor types.
Humans have a smaller number than mice; some of the genes have been lost during evolution. There are several millions of olfactory receptor cells in our olfactory epithelium.
Their work and discoveries range from how cells adapt to changes in levels of oxygen to our ability to fight global poverty.
See them all presented here.