The Aztecs didn't discover obsidian. It was already the most common raw material in Mesoamerica when they arrived in the ...

So this was really big," she said. Axolotls — named for the Aztec god of fire and lightning, Xolotl — are native to the lakes of Mexico's capital. But their colorful, whimsical looks have won ...

"They were hunting, they were eating, and they were avoiding predators. So this was really big," she said. Axolotls — named for the Aztec god of fire and lightning, Xolotl — are native to the lakes of ...