Up Next
Back to Show
NOVA
The Amazing Atomic Clock
Dr. Steve Jefferts of the National Institute of Standards and Technology in Boulder, Colorado is an expert on how we measure time. In fact, he uses one of the world's most accurate atomic clocks to calibrate time in the United States. But why do we need such accuracy? Learn why atomic clocks are so important in our everyday lives.
Sign up now for inspiring and thought-provoking media delivered straight to your inbox.
Support Provided By
Unlock with PBS Passport
53:50
An American combat hospital mobilized in Iraq faces a daily drama of wartime treatment.
53:06
Will experimental particle physics confirm the wild predictions of string theory?
52:56
Do miniscule vibrating strands of energy hold the key to a unified theory of physics?
52:55
Combining the laws of the universe in one theory that explains it all is the Holy Grail
Unlock with PBS Passport
53:40
Anorexia, bulimia, and other eating disorders are on the rise. What can be done?
Unlock with PBS Passport
53:54
In Greenland, a deserted B-29 bomber awaits rescue for more than fifty years.