How many smells are there? There are tens of thousands of different smells. Furthermore, some people can tell them all apart. It takes time to train one's eyes to see differences. In the same way, a person can learn to be a good smeller. It just takes practice. There is one other interesting fact about human noses. They continue to grow. A baby's nose is very small, and adults' noses are much bigger. A baby's feet are tiny, and adults' feet are much bigger. However, feet stop growing, but many people's noses(and ears) don't stop growing! They get larger and larger. Perhaps our need for air and the sense of smell keep on increasing too.