Dec 1 (Reuters) - More than half a millennium ago, Aztec warriors brandished a weapon called a macuahuitl, a wooden club with jagged obsidian blades embedded on its sides, to inflict gruesome wounds ...

Paleontologists work at the place where the fossilized bones of the Stegouros elengassen were found, a newly identified armored dinosaur, that inhabited the Chilean Patagonian area (Reuters) - More ...