In the strange world of quantum mechanics, objects can exist in several states at once. This concept, called superposition, is one of the most puzzling features of quantum theory. A particle, for ...

Expanding Universe Simulation (Friedmann-Lemaître Model) This project implements a numerical simulation of an expanding universe based on the Friedmann-Lemaître equations. It allows exploring various ...

Trump’s behavior in the Oval Office with Zelensky was an unparalleled break with American foreign policy.

Editor's note from The Tennessean, part of the USA TODAY Network: This story has been updated to correct the bond amount Alex Friedmann received in the jail break-in case and to more accurately ...

Our physics expert picks his top-five equations, plus a scheme to supply US power needs with a bucket of baseballs. Thanks, Einstein!

The result is the Friedmann equations, which we’ve picked apart before, and they describe how the size of the universe changes over time, driven by smoothly distributed matter and constant dark ...

Both the Hubble tension and the surprises revealed by DESI are difficult to resolve in models which use a simplified 100-year-old cosmic expansion law – Friedmann's equation.

Telkamp, H. (2016) Machian Derivation of the Friedmann Equation. Physical Review D, 94, Article ID 043520.