Before there was light, there was cosmic inflation. Before life, planet Earth, the first galaxies — and even before the violent explosion of hot dense primordial stuff scientists traditionally ...

By reanalyzing data from NASA’s Galileo mission, a team of researchers successfully filtered out decades-old interference caused by Callisto’s intense ionosphere, revealing a signal that ...

The cosmos is riddled with evidence that the universe began with an unfathomably rapid expansion — even faster than in traditional Big Bang theories — but scientists don’t know why it happened.