A chameleon-like force that shifts its nature based on its environment could explain a major physics quandary: how the mysterious substance called dark energy is compelling the cosmos to expand faster ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

A test to measure a leading candidate for dark energy, a fifth fundamental force called the chameleon force, has found no evidence that it is real. The researchers behind the test say this rules out ...

Dark energy isn’t just dark — it's nigh invisible. Hypothesized by physicists to drive the accelerating expansion of the universe, dark energy has never been directly observed or measured. Instead, ...