Carl Edward Sagan was an American astronomer, planetary scientist and science communicator. His best known scientific contribution is his research on the possibility of extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by exposure to light.

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Albert Einstein – https://youtu.be/kfC51UYWh_I

Stephen Hawking – https://youtu.be/FafFmyfK0T8

Michael Faraday – https://youtu.be/uJlcCv-G2ok

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