Astronomers are a step closer to cracking one of the secrets of dark energy—the mysterious force believed to be causing the universe's accelerated expansion.

For centuries, Europeans thought that eternal daylight saturated the cosmos. The shift to a dark universe has had a profound ...

In 1965, Frank Herbert delivered an epic tale of families at war for spice, sandworms, and planets as far away from Earth as space travel will allow -- one that would go on to be adapted into one of ...