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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
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.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.