Scientists have solved the mystery of what killed over 5 billion starfish off the Pacific coast of North America.

Scientists say they have at last solved the mystery of what killed more than 5 billion sea stars off the Pacific Coast of North America in a decade-long epidemic. The culprit? Bacteria th ...

Some Californians may experience sonic booms or see streaks across the sky as SpaceX launches a rocket on Aug. 11, one of several missions this month.