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Quantum mechanics and the general theory of relativity form the bedrock of the current understanding of physics—yet the two theories don't seem to work together. Physical phenomena rely on ...

“The one sentence statement of general relativity is that ‘gravity is the curvature of spacetime,’” explains Dr. Sean Carroll, assistant professor of physics at the University of Chicago. “Really, the ...

Simulated universe: EAGLE collaboration, J Schaye et al 2015. MNRAS, CC BY-SA A renewed suggestion that dark energy may not be real — dispensing with 70% of the stuff in the universe — has reignited a ...

An illustration of the earliest moments of the universe. Proposed changes to Einstein's relativity suggest that the universe did not start from a singularity, potentially solving one of the biggest ...

THE author has an idea: 16 to 18-year-olds should be taught special relativity at school. Most students learn it only if they take physics at university: the theory is considered too complicated any ...

Einstein’s theories of relativity propose that forward time travel is theoretically feasible by nearing light speeds, but backward time travel presents more challenges. Theoretical models like ...