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 newly measured rate of a key nuclear fusion process that forged the first atomic nuclei matches the picture of the universe 380,000 years later.
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.