Article describing the discovery of phosphorus in 1669 by an alchemist searching for the philosopher's stone, and its use a century later by Lavoisier to help usher in the era of modern chemistry. Tourist information regarding sites pertinent to this history are included.
Article describing the discovery of rhenium and technetium by Walter Karl Friedrich Noddack and Ida Eva Noddack-Tacke. Information regarding pertinent locations is included.
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