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| known_for = {{ubil|Well-posedness of the vacuum [[Einstein Equations]]}} ...ed to the [[French Academy of Sciences]]|Elected to the [[American Academy of Arts and Sciences]]}} ...

...d by René-Louis Vallée and first disseminated in 1971 with the publication of his book ''L'énergie électromagnétique matérielle et gravitationally'' (''M ...sicists to conduct a rigorous test to verify or refute the initial claims. The results were negative: no excess energy was observed. ...

{{Short description|Origins and values of the unit of length}} ...llionth of the [[Earth quadrant]], the distance from the [[North Pole]] to the [[Equator]], measured along a [[meridian (geography)|meridian]] through [[P ...

{{short description|none}} <!-- "none" is preferred when the title is sufficiently descriptive; see [[WP:SDNONE]] --> {{about|the history of the standards used in the metric system|history of adoption|Metrication}} ...