Space and time looked settled, at least in broad outline. Einstein’s special relativity gave physics a durable framework for ...

In his discussion of accelerated motion on page 60 of "The Meaning of Relativity," Albert Einstein made an approximation that allowed him to develop the theory of relativity further. Einstein ...

This project reconstructs quantum theory’s conventional set theoretic metrical formalism, grounded in object elements, as a category theoretic topological formalism grounded in object relations. The ...

Black holes, these extreme cosmic entities, might well hold the missing clues to solve one of physics' greatest mysteries: the unification of general relativity and quantum mechanics. For over a ...

Since 2007, physicist Leonard Susskind has regularly delivered a lecture series called the Theoretical Minimum, on the foundations needed to study different areas of ...