Pierre Janssen

Pierre Jules César Janssen, usually known in French as Jules Janssen, was a French astronomer who, along with the English scientist Joseph Norman Lockyer, is credited with discovering the gas helium.

«The only history that is worth a tinker's damn is the history we make today» «The very ink with which all history is written is merely fluid prejudice» «Nowhere is it ordained that history moves in a straight line»

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