1. Humans have the ability to distinguish 4,000 to 10, 000 different
2. Children have better sense of smell than adults.
3. A human ear contains about 24,000 fibers in it.
4. Women have better sense of smell than men.
5. The wax present inside the ear is made up of oil and sweat.
6. Human speech is produced by the interaction of 72 muscles.
7. Human speech and a Bird's song have similar characterization.