To scientists studying the ancient climate for clues to understand ... billion cubic metres of water a year from the Yangtze river, in southern China, to the Yellow River basin in the arid north.

The Yangtze finless porpoise is both charming and intelligent. It even appears to have a permanent smile on its face. Unfortunately, the porpoise, which is native to China, is critically endangered ...

For centuries, the Yangtze porpoise ... Tibetan Plateau to the East China Sea. To track the species' decline, researchers have turned to an unusual source— ancient Chinese poetry.