Joel Achenbach Rachel Feltman The Washington Post

The Laser Interferometer Gravitational-wave Observatory (LIGO) detected gravitational waves from the violent merging of two black holes in deep space.

Scientists announced Thursday that, after decades of effort, they have succeeded in detecting gravitational waves from the violent merging of two black holes in deep space. The detection was hailed as a triumph for a controversial, exquisitely crafted, billion-dollar physics experiment and as confirmation of a key prediction of Albert Einstein's Ge...

Astronomers at the California Institute of Technology announced Wednesday that they have found new evidence of a giant icy planet lurking in the darkness of our solar system far beyond the orbit of Pluto. They are calling it "Planet Nine."

Ephemeral brine on Mars! Hmmm. That doesn't quite have the same ring as "water on Mars!" The latter formulation sounds like a paradigm-buster. Mars was supposed to be a desert wasteland, lifeless, cold, with almost no atmosphere. But Monday NASA announced new evidence for seasonal liquid water on the surface of Mars - after teasing everyone with a ...

The Laser Interferometer Gravitational-wave Observatory (LIGO) detected gravitational waves from the violent merging of two black holes in deep space.

Scientists announced Thursday that, after decades of effort, they have succeeded in detecting gravitational waves from the violent merging of two black holes in deep space. The detection was hailed as a triumph for a controversial, exquisitely crafted, billion-dollar physics experiment and as confirmation of a key prediction of Albert Einstein's Ge...

Astronomers at the California Institute of Technology announced Wednesday that they have found new evidence of a giant icy planet lurking in the darkness of our solar system far beyond the orbit of Pluto. They are calling it "Planet Nine."

Ephemeral brine on Mars! Hmmm. That doesn't quite have the same ring as "water on Mars!" The latter formulation sounds like a paradigm-buster. Mars was supposed to be a desert wasteland, lifeless, cold, with almost no atmosphere. But Monday NASA announced new evidence for seasonal liquid water on the surface of Mars - after teasing everyone with a ...