Source: phys.orgA living organism's nose is essentially a biological molecule detector that sends neurological signals to the brain, which then decodes a particular scent. Human noses, with six million olfactory receptors, can distinguish more than one trillion scents, while some canine noses possess up to 300 million receptors, which provide enhanced sensitivity in parts per trillion.

Source: The Nation March 05, 2024 21:47 UTC