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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.