Floods ravage Texas while drought parches California. Areas of the Midwest get as much as 6 feet of rainfall. It has been a wild 2015 for United States weather, and more changes are coming when El Niño takes hold in the Pacific, a NASA scientist said.
The supermassive black hole is 40 million times as massive as the sun and powers a quasar that existed 700 million years after the Big Bang.
The asteroid zoomed by Earth at a perfectly safe distance of around 1.8 million miles (2.9 kilometers).
Images show surprise changes to the spacecraft as it interacted with the atmosphere.