You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
One human hair can support 3 ounces.
191
Your heart will pump about 212 million liters in its lifetime.
26
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193

