Some of the hardest questions in cosmology begin where the usual math gives up. Push Einstein’s theory far enough back toward ...
A newly developed solution to the equations at the heart of Albert Einstein's most revolutionary theory suggests hypothetical stars called "nestars" could be made from stacked gravitational stars, or ...
Black holes have been understood as infinite singularities for a century. In 1916, months after Einstein published general ...
Energy conditions are inequalities imposed on the stress–energy tensor that characterise physically reasonable matter in Einstein’s theory of gravitation. In classical general relativity, the null, ...
New impressions A visualization of a curved space–time “sea” from the general-relativity simulations carried out by the authors.(Courtesy: James Mertens) From the Genesis story in the Old Testament to ...
A century ago, Albert Einstein became famous. Sure, he was already well-known among physicists. But the world at large learned his name only after November 1919, when news broke that his theory of ...
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