A physicist has mounted one of the most detailed technical challenges yet against the idea that our universe is a computer simulation, arguing that the energy required to run such a program would ...

Gravity is usually presented as the most familiar of nature’s forces, the quiet background pull that keeps feet on sidewalks and planets in orbit. A growing group of physicists is now treating that ...

(The Conversation) — In the most talked-about film from the final year of the 20th century, “The Matrix,” a computer hacker named Neo finds that the world he lives and works in isn’t real. It’s a ...