In an extraordinary celestial coincidence, two "new stars" —scientifically known as novae —are currently visible to the naked ...

Health warnings were issued to tens of millions of Europeans as temperatures climbed well above 100 degrees Fahrenheit, or ...

NASA’s Perseverance rover examines a complex Martian rock, collects rare minerals, and sets a new driving record.

The heat was so expansive that mountaintops, including the French Alps, that are usually frozen from snowpack saw record ...