What Happened 51 Years Ago on July 18th?

Richard Cartwright PE, CHMM, (IHMM, AHMP, APICS Fellow) Richard Cartwright PE, CHMM, (IHMM, AHMP, APICS Fellow)

Richard Cartwright PE, CHMM, (IHMM, AHMP, APICS Fellow)

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发布日期: 2017年7月18日
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July 18, 1966: To help people comprehend how large a billion units really is, Carl Sagan, American astronomer, astrophysicist, cosmologist, author & science communicator announced to the world that he had just turned 1 billion seconds old (he was born on November 9th in 1934. Note: The average person doesn’t comprehend what is a part per billion let alone a part per million. Do you know what is a billion miles from Planet Earth?

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