What is our Universe made out of? At a fundamental level, to the best of our knowledge, the answer is simple: particles and fields. The type of matter that makes up humans, Earth, and all the stars, ...

The Large Hadron Collider (LHC) collaboration at CERN discovered a known difference between matter and antimatter, contradicting a long believed theory that they were more similar. The research was ...

If asked what the great mysteries of cosmology were, I think most cosmologists would answer: inflation, dark energy, and dark matter. These three concepts are almost completely separate at present.

The subatomic particle discovered last year at Europe's Large Hadron Collider is looking more and more like the fabled Higgs boson, the one fundamental piece that's been missing from the theory that ...

Nothing can move faster than the speed of light. When Einstein set forth his theory of relativity, this was his inviolable postulate: that there was an ultimate cosmic speed limit, and that only ...