Question 1
Question 2
Ask unlimited questions for free
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
The FDA recognizes 118 routes of administration.
The longest a person has survived after a heart transplant is 24 years.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
For a complete list of videos, visit our video library