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Humans May Have Lived in North America Earlier Than Thought
Ancient human footprints in White Sands National Park reveal that humans first arrived in North America thousands of years earlier than previously thought.
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1:49:01
The story behind the world's most famous equation, e=mc2
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53:31
Learn about the elements and their roles in the universe.
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53:31
Journey back to the beginning of everything: the universe, Earth, and life itself.
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50:52
Journey back to the beginning of everything: the universe, Earth, and life itself.
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51:52
Journey back to the beginning of everything: the universe, Earth, and life itself.
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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
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53:40
Anorexia, bulimia, and other eating disorders are on the rise. What can be done?
53:54
In Greenland, a deserted B-29 bomber awaits rescue for more than fifty years.