Astronomy
How Nearby Stellar Explosions Could Have Killed Off Large Animals
A new study suggests that subatomic particles called muons streamed through the atmosphere and fatally irradiated megafauna like the monster shark megalodon.
The Woman Who Reinvented the Moon
A MacArthur “genius grant” winner writes a new lunar origin story.
Our Attitude Toward Aliens Proves We Still Think We’re Special
Why we downplay Fermi’s paradox.
Why Can’t We Find Planet Nine?
Astronomers suspect that there’s a large planet hiding out in the distant fringes of the solar system. At a recent workshop, they brainstormed ways to coax it into view.
