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Vor einem Tag · History Early history. The hypothesis of dark matter has an elaborate history. In the appendices of the book Baltimore lectures on molecular dynamics and the wave theory of light where the main text was based on a series of lectures given in 1884, Lord Kelvin discussed the potential number of stars around the Sun from the observed velocity dispersion of the stars near the Sun, assuming that ...
Vor einem Tag · Post-apocalyptic stories often take place in a non-technological future world or a world where only scattered elements of society and technology remain. Various ancient societies, including the Babylonian and Judaic, produced apocalyptic literature and mythology which dealt with the end of the world and human society, such as the Epic of Gilgamesh , written c. 2000–1500 BCE.
Vor einem Tag · Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail.
