First physical evidence of tobacco in a Mayan container

A scientist at Rensselaer Polytechnic Institute and an anthropologist from the University at Albany teamed up to use ultra-modern chemical analysis technology at Rensselaer to analyze ancient Mayan pottery for proof of tobacco ...

China's Great Wall far longer than thought: survey

The most comprehensive and technologically advanced survey of China's Great Wall has discovered the ancient monument is much longer than previously estimated, state media reported Monday.

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