The average sperm cell swims at 8 inches per hour.
4
From the age of thirty, humans gradually begin to shrink in size.
1
The human brain is more active during sleep than during the day.
28
The tongue is the strongest muscle in the human body.
50
Your ears secrete more earwax when you are afraid than when you aren't.
235
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
Clinophobia is the fear of beds!
30