On this day in 1905, Albert Einstein's paper "Does the Inertia of a Body Depend Upon Its Energy Content?” is published, introducing the equation E=mc² and the Special theory of relativity.

Learn about Einstein's life, giving context to his work, from the words of Carlo Rovelli in Seven Brief Lessons on Physics: http://www.cpt.univ-mrs.fr/~rovelli/#books

Today is September 27, 2020.

This is the Librarian’s Almanac.

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