Ten states elect their public utility commissions, which make big decisions about energy. This November, the stakes are high, especially in Arizona and Louisiana.

Aside from states voting on marijuana, Massachusetts voters will have the chance to vote on the legalization of psychedelics on Tuesday, Nov. 5.

Taiwan Semiconductor Manufacturing Co. has achieved early production yields at its first plant in Arizona that surpass ...

Invisibly to us, insects and other tiny creatures use static electricity to travel, avoid predators, collect pollen, and more ...

Tucson and other desert cities benefit more from the cooling effects of trees than other urban areas do, according to new study by the U.S. Geological Survey.

More than 256,000 people moved here last year from somewhere else. Close to a quarter arrived from another country. But many were from other states. Can you guess which state ...