The Aztecs made extremely sharp knives and weapons from obsidian.

VOA: special.2009.09.16

And so there are famous reports of how the Aztecs, that whole civilization, was devastated by smallpox.

有报道说阿兹特克文明如何发达,但这整个文明,都毁灭于天花

耶鲁公开课 - 生物医学工程探索课程节选

His father told him that their ancestors were the kings and queens of the Olmecs, Toltecs,Mayans,Aztecs and other ancient peoples.

VOA: special.2010.06.21