Last month, rafts of pumice, spewed from an undersea volcano and spanning an area about the size of Washington, D.C., appeared in the South Pacific.

Have you ever seen a red rainbow? You might, if you’re outside at sunrise or sunset at a time when there’s rain in the air. Red rainbows have a surreal beauty, but their explanation is fairly ordinary. They’re created via the same physics that makes a sunset or sunrise looks red.

A new study that analyzed rock from deep within the Chicxulub impact crater helps reveal what happened within the first 24 hours after the asteroid impact that doomed the dinosaurs.

Carbon dioxide, CO2, makes up less than one-twentieth of 1% of Earth’s atmosphere. How does this relatively scarce gas control Earth’s thermostat?