An "Impenetrable Barrier" Protects The Earth From Killer Electrons

It appears that our planet's built-in force field is much stronger than we thought. Scientists studying the Van Allen belts have discovered the presence of a nearly impenetrable barrier that prevents some of the fastest and most powerful "ultrarelativistic" electrons from reaching the surface. » 11/27/14 1:00pm Yesterday 1:00pm

Why the U.S. Is One of the Cruelest Places in the World for Lab Animals

The United States prides itself on being a country of animal lovers. But when it comes to the ethical treatment of lab animals, few countries perform worse. Here's how the U.S. has fallen out of step with the rest of the world, and why many of its practices are considered unscientific and inhumane. » 11/26/14 11:00am Wednesday 11:00am