Ask unlimited questions for free
Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
For a complete list of videos, visit our video library