Outer Space

World’s oldest trees reveal the largest solar storm in history
Astronomers use dead stars to measure gravitational waves produced by ancient black holes
How Mars lost its magnetic field — and then its oceans
A comet impact 13,000 years ago might have wiped out megafauna
How the world’s most sensitive yardstick reveals secrets of the universe
How to terraform Mars, without nukes, on a budget
Understanding just how big solar flares can get
Here’s how growing plants on the Moon could benefit Earth
For the first time, astronomers have detected a radio signal from the massive explosion of a dying white dwarf