Up in the air! US government's UFO report stirs range of reactions

'Fool's Gold' Actually Contains a Newly Discovered Type of Real Gold, Scientists Find

Astronomers confirm there’s a third type of supernova explosion, called an "electron-capture" supernova. The new sighting shores up a decades-old suspicion about the nature of a long-lived supernova seen in 1054 A.D., which created the famous Crab Nebula.

Scientists develop simple blood test for early detection of Alzheimer's disease