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Emilio Segrè, one of the discoverers of the main-group element astatine
Emilio Segrè, one of the discoverers of the main-group element astatine
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Estimated distribution of dark matter and dark energy in the universe. Only the fraction of the mass and energy in the universe labeled "atoms" is com
Estimated distribution of dark matter and dark energy in the universe. Only the fraction of the mass and energy in the universe labeled "atoms" is composed of chemical elements.
Portrait of Robert Boyle, c. 1740
Portrait of Robert Boyle, c. 1740
Title page of The Sceptical Chymist, published in 1661
Title page of The Sceptical Chymist, published in 1661
Portrait of Isaac Watts by John Shury, c. 1830
Portrait of Isaac Watts by John Shury, c. 1830