Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
During menstruation, the sensitivity of a woman's middle finger is reduced.
47
A human being loses an average of 40 to 100 strands of hair a day.
133
One quarter of the human brain is used to control the eyes.
43
There is a disease called ichthyosis that turns the skin scaly like a fish.
90
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
In older people, memory is best early in the morning and then declines during the late afternoon.
33
Children are more allergic to cockroaches than they are to cats!
46