Caltech astronomer Mansi Kasliwal and her colleagues were not expecting to chase a mystery that blurred the line between a ...

The combination of a supernova and a kilonova may have produced a rare space explosion that astronomers have never seen ...

McEWEN, Tenn. (AP) — A massive blast at a Tennessee explosives plant that killed 16 people, leveled the building and was felt more than 20 miles away began in an area where workers used kettles to ...