“Even today, there persists… a feeling that the creation of the Universe out of nothing must violate some basic conservation law that stops one from getting something for nothing. Nevertheless, there is actually no evidence that the Universe as a whole possesses a non-zero value of any such conserved quantity. The total mass-energy of all the constituents of a finite Universe appears to be always equal in magnitude but opposite in sign to the total gravitational potential energies of those particles. …Similarly, there is no evidence that the Universe possesses any overall net rotation or electric charge.”

New Theories of Everything (2007)

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John D. Barrow 58
British scientist 1952–2020

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“The Law of conservation of energy tells us we can't get something for nothing, but we refuse to believe it.”

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“There was always something left: a vacuum energy that permeated every fibre of the Universe.”

John D. Barrow (1952–2020) British scientist

Source: The Book of Nothing (2009), chapter nought "Nothingology—Flying to Nowhere"<!-- p. 10-->
Context: The quantum revolution showed us why the old picture of a vacuum as an empty box was untenable.... Gradually, this exotic new picture of quantum nothingness succumbed to experimental exploration... in the form of vacuum tubes, light bulbs and X-rays. Now the 'empty' space itself started to be probed.... There was always something left: a vacuum energy that permeated every fibre of the Universe.

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