Dark energy alternatives to Einstein are running out of room

(Phys.org)—Research by University of Arizona astronomy professor Rodger Thompson finds that a popular alternative to Albert Einstein's theory for the acceleration of the expansion of the universe does not fit newly obtained ...

SLAC theorist explains quantum gravity

Our world is ruled by four fundamental forces: the gravitational pull of massive objects, the electromagnetic interaction between electric charges, the strong nuclear interaction holding atomic nuclei together and the weak ...

Challenging Einstein is usually a losing venture

(AP) -- Betting against Einstein and his theory of relativity is a way to go broke. For more than a century, everyone from physicists to the Nazi Party - which encouraged the publication of the tract "One Hundred Authors ...

The Big Bang versus the 'Big Bounce'

Two fundamental concepts in physics, both of which explain the nature of the Universe in many ways, have been difficult to reconcile with each other. European researchers developed a mathematical approach to do so that has ...

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