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Cosmos: A Spacetime Odyssey: Unafraid of the Dark

Cosmos: A Spacetime Odyssey (2014)

Documentary | United States

National Geo | Friday 22 December 2017 | 08:00

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Friday 22 December 2017 08:00

Saturday 12 November 2016 20:00

SEASON: 1

EPISODE: 13 - Unafraid of the Dark

SYNOPSIS

Describing the discovery of cosmic rays by Victor Hess in high altitude balloon trips, and how this led to the discovery of dark matter. Later, Tyson talks about interstellar travel, and the history of the Voyager probes.

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