Unique

  1. Hard-working heart The heart is the hardest working muscle in the body. Every day, it creates enough energy to drive a semi-truck over 18 miles (30 kilometers). Over a lifetime, that’s equivalent to driving to the moon and back. 2. Amazing brain The brain is 60 percent fat, but it still works hard. At any given time, your brain can generate up to 25 watts of power – that’s enough to power a light bulb. 3. Growing skin Skin is the human body’s largest organ and is constantly renewing itself. Your skin sheds 50,000 cells every minute. Over a lifetime, that piles up to 40 pounds (18.1 kilograms) of skin. 4. Womb with a view Babies in the womb grow 8,000 new brain cells every second. Newborn babies can recognize their mother’s face after just a few hours. 5. Fast sneeze The typical human sneeze travels at just under 40 mph (64 kph). That’s the same speed as a running tiger!