The universe may be full of ex-moons flung from their home worlds

Moons in other stellar systems may be hurled away from their planets up to 90 per…

2018 preview: Epic mission to Mercury will unravel its mysteries

In October, a probe called BepiColombo will begin a seven-year voyage to Mercury with the aim…

Space-time and gravity might be born from the quantum world

To reconcile quantum mechanics and gravity, a new theory flips the usual script. Space-time and gravity…

Space-time and gravity might be born from the quantum world

To reconcile quantum mechanics and gravity, a new theory flips the usual script. Space-time and gravity…

Earth was smashed by a rock the size of Mars to make the moon

4.5 billion years ago, a rock called Theia crashed into Earth and formed the moon. Now…

Parallel universes could solve a big problem with black holes

The black hole firewall paradox has been vexing physicists for years. But if quantum laws lead…

Earth was smashed by a rock the size of Mars to make the moon

4.5 billion years ago, a rock called Theia crashed into Earth and formed the moon. Now…

NASA plans a launch to Titan or a return to comet 67P in 2025

In 2025 NASA will either launch a probe to bring back samples from comet 67P, previously…

NASA plans a launch to Titan or a return to comet 67P in 2025

In 2025 NASA will either launch a probe to bring back samples from comet 67P, previously…

Mars rocks may have drunk up all the water and doomed life there

We used to think Mars lost most of its water to space when its atmosphere blew…