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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.
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
More than 4.4billion prescriptions were dispensed within the United States in 2016.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.