Human bones are 25% water.
The largest feet in the world belong to American Matthew McGrory and are a whopping 281/2.
The world's heaviest kidney stone weighed 12.5 ounces, and measured 4.66 inches at its widest point.
Monaco has the largest number of doctors per capita, with one doctor per 169 people.
Malawi has the fewest, with only one doctor per 49,118 people.
The longest medical operation ever to take place lasted 96 hours, it took place in 1951 and involved the removal of an ovarian cyst.
25% of your bones are in your feet.