The fossil of the pithecanthropus Yuxian Man cranium unearthed in Shiyan is considered as the national treasure.

一百万年前“郧阳人”在这里迎来文明曙光。十堰出土的人类头骨化石堪称国宝。

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Burning fossil fuels releases carbon dioxide, which many scientists describe as the biggest man-made contributor to global warming.

燃烧石化燃料释放出的二氧化碳被很多科学家认为是导致气候变化的最主要的人为因素。

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The fossil (tooth) of "Hetao Man" (UPP) discovered in Inner Mongolia.

河套人牙齿化石在内蒙古发现。

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On the lake's northern shore, a fossil of a giant femur bone, bigger than an adult man, leans against a rock-face and signals your arrival at the Lago Barreales Paleontological Center.

BBC: The dinosaur route of northwest Patagonia

The burning of fossil fuels, such as coal for electricity and oil for gasoline, has caused the overwhelming bulk of the man-made increase in carbon in the air, scientists say.

NPR: Experts: CO2 Record Illustrates 'Scary' Trend