Scientists have known for decades that some animals use the Earth's magnetic field to help them navigate, kind of like an internal GPS. How they do it, though, remains unclear. NPR's Nate Rott reports ...

In a crowded room, we naturally move slower than in an empty space. Surprisingly, worms can show the exact opposite behavior: In an environment with randomly scattered obstacles, they tend to move ...

Add Yahoo as a preferred source to see more of our stories on Google. Researchers at Case Western Reserve University are developing a new self-propelled robotic sleeve inspired by the earthworm.