Scientists stalk coastal killer

CAROLINA BEACH, N.C. -- For much of Wednesday, a small group of volunteers and researchers walked in and out of the surf testing a new form of surveillance on the biggest killer of beach swimmers -- rip currents.

Again and again the researchers ...

Tyrannosaurs ran in gangs, fossil footprints show

LOS ANGELES -- Talk about a triple threat. If you thought tyrannosaurs weren't scary enough, try three of them at the same time. Turns out these fearsome beasts weren't solitary hunters -- they ran in gangs, according to a study of the first ...