Ask unlimited questions for free
There are 20 feet of blood vessels in each square inch of human skin.
Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
Illicit drug use costs the United States approximately $181 billion every year.
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
For a complete list of videos, visit our video library