You inhale about 700,000 of your own skin flakes each day.
29
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
Your hair grows faster in the morning than at any other time of day.
91
The first patented condom was meant to be reused!
47
Your heart rate can rise as much as 30% during a yawn.
69
Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44