In physics, the Planck length, denoted ℓP, is a unit of length, equal to 1.616199(97)×10−35 metres. It is a base unit in the system of Planck units. The Planck length can be defined from three fundamental physical constants: the speed of light in a vacuum, Planck's constant, and the gravitational constant.
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“People are always dying in the Times who don’t seem to die in other papers, and they die at greater length and maybe even with a little more grace.”
—James Reston (b. 1909)
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