Enamel is hardest substance in the human body.
61
Only 1% of bacteria cause disease.
45
In older people, memory is best early in the morning and then declines during the late afternoon.
33
It takes about 20 seconds for a red blood cell to circle the whole body.
102
10 seconds is the amount of time until unconsciousness after the loss of blood supply to the brain.
108
When you take a step, you are using up to 200 muscles.
885
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14
A woman's sense of smell is most sensitive during ovulation.
34