Paleontologists in England discovered the existence of a new marine species that roamed the Earth before the dinosaurs and ...

"Sue is an inside-out, legless, headless wonder," lead author Sarah Gabbott, a paleontologist at the University of Leicester in the U.K., said in a statement. "Remarkably, her insides are a ...

But headless animals called brittle stars have no brains ... Early in the 10-month-long experiment, the animals stayed hidden when the lights went out. But over time, the animals made such a ...

Japan's government approved a request for stem-cell experiments meant to create an animal-human hybrid and allow it to be brought to term. The experiment, which still requires approval from the ...