The Key to the Universe (1977)
Context: In a sense, human flesh is made of stardust.
Every atom in the human body, excluding only the primordial hydrogen atoms, was fashioned in stars that formed, grew old and exploded most violently before the Sun and the Earth came into being. The explosions scattered the heavy elements as a fine dust through space. By the time it made the Sun, the primordial gas of the Milky Way was sufficiently enriched with heavier elements for rocky planets like the Earth to form. And from the rocks atoms escaped for eventual incorporation in living things: carbon, nitrogen, oxygen, phosphorus and sulphur for all living tissue; calcium for bones and teeth; sodium and potassium for the workings of nerves and brains; the iron colouring blood red… and so on.
No other conclusion of modern research testifies more clearly to mankind’s intimate connections with the universe at large and with the cosmic forces at work among the stars.
“every atom in your body came from a star that exploded. and, the atoms in your left hand probably came from a different star than your right hand. it really is the most poetic thing i know about physics: you are all stardust.”
"A Universe From Nothing" by Lawrence Krauss, AAI 2009 http://www.youtube.com/watch?v=7ImvlS8PLIo#t=16m49s (16:50-17:23)
Context: The amazing thing is that every atom in your body came from a star that exploded. And, the atoms in your left hand probably came from a different star than your right hand. It really is the most poetic thing I know about physics: You are all stardust. You couldn’t be here if stars hadn’t exploded, because the elements - the carbon, nitrogen, oxygen, iron, all the things that matter for evolution - weren’t created at the beginning of time. They were created in the nuclear furnaces of stars, and the only way they could get into your body is if those stars were kind enough to explode. So, forget Jesus. The stars died so that you could be here today.
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Lawrence M. Krauss 21
American physicist 1954Related quotes
“The stars are yours, if you have the head, the hands, and the heart for them.”
Introduction
R Is for Rocket (1962)
letter to J.B. McChesney http://digitalcollections.pacific.edu/cdm/compoundobject/collection/muirletters/id/12909/rec/84 (19 September 1871)
1870s
Dedicatory poem, to "S. A.", as written in the 1922 "Oxford text"; variant : "When we came" for "When I came" in the 1926 edition, and others.
Seven Pillars of Wisdom (1922)
