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Vor 6 Stunden · Heraclitus ( / ˌhɛrəˈklaɪtəs /; Greek: Ἡράκλειτος Herákleitos; fl. c. 500 BC) was an ancient Greek pre-Socratic philosopher from the city of Ephesus, which was then part of the Persian Empire. He exerts a wide influence on ancient and modern Western philosophy, including through the works of Plato, Aristotle, Hegel, and Heidegger.
Vor 6 Stunden · Because dark matter has not yet been identified, many other hypotheses have emerged aiming to explain the same observational phenomena without introducing a new unknown type of matter. The theory underpinning most observational evidence for dark matter, general relativity, is well-tested on solar system scales, but its validity on galactic or cosmological scales has not been well proven. [175]