Could antimatter weigh more than matter?

Antimatter may weigh more than matter of the same mass, say physicists at the University of California, Riverside, who are attempting to establish how it behaves in gravity.

Superconductor research indicates new phase of matter

Scientists believe they've found an answer to a puzzling gap in the electronic structures of some high-temperature superconductors - and that the answer could be a previously-undiscovered phase of matter.

Team says it can make matter and antimatter out of nothing

In the beginning was the equation - and University of Michigan researchers say they've demonstrated mathematically that it's possible to make something out of nothing.