Scientists can learn a lot about a quantum material by watching how it responds to light. In magnetic semiconductors, one especially useful messenger is the exciton: a pairing of a negatively charged ...

The European Union has declared that it wants to stop using animals in chemical safety testing. Its goal will need a timeline and a serious funding commitment.

Some of San Diego’s neediest rec centers aren’t getting the windfall they expected from a new fund. Here’s why. While council members praise the fund for reviving many rec centers and helping to boost ...