British artist David Watkins designed the medals for the London Olympics.
U.S. swimmer Michael Phelps is all-time Olympic medal winner with 20 (and counting).
The last Olympic gold medals that were made entirely out of gold were awarded in 1912.
At the first modern Games in Athens in 1896, the medals were 50 mm (about 2 inches) in diameter.
Badminton, table tennis, and handball are the only sports in which the U.S. has never won a medal.
At the London 2012 Games, the medals will be the heaviest and largest in Olympic history.
The United States won 110 Olympic medals in Beijing, edging China as the leader at the Games.
In total, 12 athletes have won Olympic medals while representing two distinctly different countries.
