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There are 60,000 miles of blood vessels in every adult human.
Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.