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Vaccines prevent between 2.5 and 4 million deaths every year.
The horizontal fraction bar was introduced by the Arabs.
Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.
If you could remove all of your skin, it would weigh up to 5 pounds.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.