Scientists have discovered the largest organic molecule containing sulfur — a key ingredient for life — ever identified in interstellar space. The researchers call the discovery a “missing link” in ...
The National Park Service has removed exhibits depicting slavery and George Washington's treatment of enslaved people at the President's House in Philadelphia. The National Park Service has taken down ...
On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table. He ...
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