and it hurts...

The human ear can hear approximately 19,881 different pitches ranging from 20 to 20,00 Hz. There are also nearly 7 million colors visible to the human eyes. The tongue happens to be the strongest muscle in the human body. 1 in every 5 teens has thought about suicide. 1 in 6 have made plans for suicide. And over 1 in 12 have attempted suicide in the past year. The human is the only animal that is capable of crying tears. It's physically impossible to hum when your nose is plugged. It takes 492 seconds for sunlight to reach the earth. If you yell for 8 years, 7 months, and 6 days, you will produce enough sound energy to heat a cup of coffee. Eyes are composed of 2 million working parts. Only one-sixth of you eyeball is exposed to the outside word. Venus is the only planet that rotates clockwise. Woman blink nearly twice as many times as men. Nerve impulses traveling to and from the brain travel as fast as 170mph. 80% of the brain is water. The fastest growing nail is on the middle finger. Sneezes regularly exceed 100mph. Coughs clock at about 70mph. If you put all the blood vessels in your body into a line they will stretch a distance of 60,000 miles.