Yes,you can see horns." These 500 to 1000-year-old cave paintings are young compared to the skeleton of Ardi, an upright hominid more than four million years old discovered in Ethiopia's Great Rift Valley .

VOA: standard.2009.12.14

But the students, they think that I'm an old woman from the cave and I don't know anything

但学生们认为我是住在洞穴的老女人，我什么也不懂，

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Scientists believe sandals found in the Arnold Research Cave in the American state of Missouri are about seven thousand five hundred years old.

VOA: special.2010.08.03

Staged in an old cave quarry, this massive, excavated cavern is divided into several connecting spaces that can be viewed in total from various vantage points.

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But it also had some good ideas, like visiting an 80, 000-year-old living cave.

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Millions also live in dilapidated old buildings, many of which cave in during rains.

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