21. The average lifespan of hair is 3-7 years.
22. A full bladder is about the size of a softball.
23. Our teeth actually start growing when we’re in the womb. Research found that they start to grow when we are 6 months in the womb.
24. Babies only see black and white when they are born.
25. No matter the genetics, most babies are born with blue eyes. What causes them to change to their true colours over time is the exposure to ultraviolet light (i.e. the sun) and melanin.
