When your face blushes, the lining of your stomach turns red, too.
154
Your heart rate can rise as much as 30% during a yawn.
69
Contrary to popular beliefs, chocolate does not cause acne.
63
It has been shown that caffeine causes headaches when stopped suddenly and can cause morning headaches that are relieved by a dose of caffeine.
101
It is almost impossible to sneeze with your eyes open. It is a defense mechanism that has evolved to protect our eyes from bacteria and debris.
164
According to one report, it would take 800 marijuana joints to kill a person - but the cause of death would be carbon monoxide poisoning.
176
One quarter of the human brain is used to control the eyes.
43
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15