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On the other hand, the theory makes natural laws invariant—examples are the constancy of the speed of light, or the covariance of Maxwell's equations. Consequently, Felix Klein (1910) called it the "invariant theory of the Lorentz group" instead of relativity theory, and Einstein (who reportedly used expressions like "absolute theory ...
Although never developed into an effective weapons system, psychochemical warfare theory and research—along with overlapping mind control drug research—was secretly pursued in the mid-20th century by the US military and Central Intelligence Agency (CIA) in the context of the Cold War. These research programs were ended when they came to ...
2012 phenomenon – a range of eschatological beliefs that cataclysmic or otherwise transformative events would occur on or around 21 December 2012. This date was regarded as the end-date of a 5,126-year-long cycle in the Mesoamerican Long Count calendar and as such, festivities to commemorate the date took place on 21 December 2012 in countries where the Maya civilization had formerly ...
The more complicated relativistic mechanics must be used for long distances and velocities nearing the speed of light, and quantum mechanics for very small distances and objects. Some aspects of discarded theories are reused in modern explanations. For example, miasma theory proposed that all
These are lists of investigational drugs: List of investigational aggression drugs; List of investigational agitation drugs; List of investigational analgesics;
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The measurements of speed of light are also mentioned only to the minimum extent, i.e. when they proved for the first time that c is finite and invariant. Innovations like the use of Foucault's rotating mirror or the Fizeau wheel are not listed here – see the article about speed of light. This timeline also ignores, for reasons of volume and ...
ATS when used illicitly has street names including ice, meth, crystal, crank, bennies, and speed. Within the group of amphetamine-type stimulants, there are also prescription drugs including mixed amphetamine salts, dextroamphetamine, and lisdexamfetamine. Amphetamine was first synthesized in 1887 by the Romanian chemist Lazar Edeleano.