Well, it's July 12, which means (a) the Steam Summer Sale is over and (b) it's really hot outside in the northeastern U.S.

Citrus greening is a disease with no known cure that has infected nearly every citrus grove. It first cropped up 20 years ago. There's still no cure.

An international team, including astronomers from Keele University, has performed a unique cosmic test to measure the mass of ...