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Who Speaks for Earth

   1980    Culture
Sagan reflects on the future of humanity and the question of 'who speaks for Earth?' when meeting extraterrestrials. He discusses the very different meetings of the Tlingit people and explorer Jean-François de La Perouse with the destruction of the Aztecs by Spanish conquistadors, the looming threat of nuclear warfare, and the threats shown by destruction of the Library of Alexandria and the murder of Hypatia. The episode ends with an overview of the beginning of the universe, the evolution of life, and the accomplishments of humanity and makes a plea to mankind to cherish life and continue its journey in the cosmos. The Cosmos Update notes the preliminary reconnaissance of planets with spacecraft, the fall of the Berlin Wall and the end of apartheid in South Africa, and measures towards the reduction of nuclear weapons.
Series: Cosmos
The Human Body
The Human Body

   1998    Medicine
Frozen Planet
Frozen Planet

   2011    Nature
Catalyst
Catalyst

   2017    Science
Reel Rock
Reel Rock

   2014    Culture
Dirty Money
Dirty Money

   2018    Culture
The Nazis, A Warning From History
The Nazis, A Warning From History

   1997    History