1.It takes about 20 seconds for a red blood cell to circle the whole body

2.Every day 200 million couples make love, 400,000 babies are born and 140,000 people die

3.When hippos are upset,their sweat turns red

4.Every time you sneeze some of your brain cells die

5.The pupil of the eye expands as much as 45% when a person looks at something pleasing

6.German Shepherds bite human more than any other breed of dogs

7.The first Harley Davidson motorcycle was built in 1903 and used a tomato can for carburetor

8.Intelligent people have more zinc and copper in their hair

9.The reason honey is so easy to digest is that it's already digested by a bee

10.The only two animals that can see behind itself without turning its head are the rabbit and parrot

11.Human hair and finger nails continue to grow even after death

12.Drinking black tea can help prevent lung damage caused by smoking.