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Simply the Best Documentaries

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Steve Jobs the Lost Interview
In Search of Beethoven I
The Captains
Monkey Kingdom
Unity
History of the World in Two Hours
Audrey Hepburn: The Fairest Lady
Michael Moore in TrumpLand
Aliens
Is There a Shadow Universe
Land of the Cave-Bear
The Private Life of Plants Living Together
Weapons of Mass Extinction
Life of a Universe End of Days
WWII In 3D
Requiem for the American Dream
Rothko
Heart of a Dog
Planet Ocean
Ancient Aliens Debunked: Nazca Lines
Ancient Aliens Debunked: Anunnaki
Artic
Intimate Relations
Pluto and Beyond
Bomb It
Into the Abyss
Boko Haram and Unnatural Selection
One Life on the Limit
The Nazis, A Warning From History. Episode 5
Building the Sun The 250 Million Degree Problem
Humpback Whales
When Did Time Begin
What the World is Waiting for - British Indie
Little Das Hunt
Mission Pluto
Is Anybody Out There

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Unafraid of the Dark
Unafraid of the Dark 2014

Tyson describes the discovery of cosmic rays by Victor Hess through high-altitude balloon trips. Swiss Astronomer Fritz Zwicky, in studying supernovae, postulated that these cosmic rays originated from these events instead of electromagnetic radiation. Also tells how Vera Rubin observed that the rotation of stars at the edges of observable galaxies did not follow expected rotational behavior leading to consider the existence of dark matter. This further led to the discovery of dark energy to account for the increasing rate of expansion of the universe. Tyson then describes the interstellar travel of the two Voyager probes. Tyson tells the Carl Sagan's role in the Voyager program, including creating the Voyager Golden Record to encapsulate humanity and Earth's position in the universe. Tyson concludes the series by emphasizing Sagan's message on the human condition in the vastness of the cosmos, and to encourage viewers to continue to explore and discover what else the universe has to offer.

Category:Science  Duration:43:00   Series: Cosmos 2014

 
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