pee - ew mammals use their sense of smell toseek out food avoid predators and find a mate.But some are better sniffers than others and the mammals that reign supreme have more olfactory receptors dedicated to smelling .The amount of receptors is determined the by number of scent genes in an animal's DNA- the more you have the better you sniff Check out the number of genes devoted to smell in these mammals to see who takes the best whiff. ( African elephants 1,948 and guinea pig 796 rat ,1207 some sharks can smell one drop 25 million of blood in drops of ocean. a polar bear can smell a seal the ice from miles away. human 396 the human brain can detect more than 10,000 different smells. dog 811 orangutan 296 horse 1,066.)
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