Mesmerizing Aurora in Dramatic Landscapes of Fire, Ice, and Shadow

Aurora are beautiful, but the fire and smoke of Bárðarbunga step it up to gorgeous. The weekend kicked off with the Earth putting on a glorious display of green, blue, purple, and red, and countless photographers braved varied terrain to capture the ephemeral light for your viewing pleasure. » 9/13/14 9:01am 9/13/14 9:01am

Scientists use trout to unlock the secrets of magnetic cells

This trout looks guilty for a reason. It's hiding one of nature's most intriguing mysteries: the secret of magnetoception. For decades, behavioral experiments have suggested that a variety of animals possess this ability to sense — and navigate by — the Earth's magnetic fields, but identifying what, exactly, endows… » 7/10/12 8:30am 7/10/12 8:30am

The Earth's Magnetic Polarity is Due for a Reversal

Armed with a gigantic, spinning steel ball, researchers hope to simulate the Earth's magnetic field and discover how likely it is that our planet's magnetic polarity will flip sometime soon. Our magnetic field has reversed polarity in the past many times, though not in the last 780,000 years. So it's unclear what… » 9/18/08 12:20pm 9/18/08 12:20pm