Each year in late spring, the forest fills with fireflies that flash in unison at Great Smoky Mountains National Park. The synchronous show draws so many spectators to eastern Tennessee that the park ...

Rectifiers, which allow an electrical current to flow in one bias direction but not in the other, are widely used for a variety of devices. But although efficient rectification in bulk semiconductor ...

Chinese President Xi Jinping, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, addresses a training session for high-ranking ...

Leah Zitter is a technical writer who covers high tech. She holds a Ph.D. in psychology research and a master’s in philosophy and advanced logic. Eleven years ago, researchers warned in the journal ...