Ask unlimited questions for free
There are 20 feet of blood vessels in each square inch of human skin.
Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
The longest a person has survived after a heart transplant is 24 years.
For a complete list of videos, visit our video library