Richard Feynman e1571844522225 • Richard Feynman: a lecture on Time
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Richard Feynman: a lecture on Time

It is obvious to everybody that the phenomena of the world are evidently
irreversible. Things happen that do not happen the other way. You drop a cup and it breaks, and you can sit there a long time waiting for the pieces to come together and jump back into your hand.

Pale Blue Dot - Cosmos, A Spacetime Odyssey (2014)
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Pale Blue Dot

Watch Carl Sagan deliver his now famous Pale Blue Dot speech for the very first time to a live audience.