After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
Only 1% of bacteria cause disease.
45
Scientists estimate that laughing 100 times is equivalent to a 10-minute workout on a rowing machine.
202
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
Redheads require more anesthesia to 'go under' than other hair colors do.
50
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Enamel is hardest substance in the human body.
61
You're born with 300 bones, but when you get to be an adult, you only have 206!
17