PLQY is a measure of how efficiently a material converts absorbed light into emitted light. It’s the ratio of the number of ...

The theory of how life develops on Earth has inspired a lot of controversial and inaccurate statements—including some from Charles Darwin himself. No species better exemplifies this than human beings.

The city of Tucson is watching you but not nearly as much as they may someday. Plus: Sales tax revenues lag expectations, Pima County is doing a deal with Sahuarita and Oro Valley for better broadband ...