Articles by

Katherine Kornei

A weaker magnetic field may have paved the way for marine life to go big

Earth’s magnetic field protects life from harmful cosmic radiation. But sometime between about 590 million and 565...

An asteroid may have exploded over Antarctica about 2.5 million years ago

Around 2.5 million years ago, an asteroid may have exploded over Antarctica.  The evidence comes from a...

Ocean heat waves often lurk out of sight

Heat waves don’t just strike on land — they can also occur in the ocean. And roughly...

How drones are helping scientists find meteorites

Meteorites offer tantalizing clues about what the early solar system was like. But finding them is far...

Dry farming could help agriculture in the western U.S. amid climate change

In the parking lot behind a grocery store in Portland, Ore., last September, several hundred tomato aficionados...