The first detailed observations of lightning’s emergence inside a cloud have exposed how electric fields grow strong enough to let bolts fly.
Years of conflicting measurements have led physicists to propose a “dark sector” of invisible particles that could explain dark matter and the universe’s expansion.
Theorists are in a frenzy over these bizarre, but potentially useful, hypothetical particles that can only move in combination with one another.
Three-dimensional computer simulations have solved the mystery of why doomed stars explode at all.
The hypothetical particles are a cornerstone of quantum gravity theories, but they’re famously hard to observe. Yet maybe they create detectable ‘noise.’
The Hubble constant predicts how rapidly space should grow—but astronomical observations don’t line up. Here are the top ideas about what might be going on.