Similar patterns exist throughout the U. S. By measuring the proportion of heavier hydrogen and oxygen isotopes along a strand of hair, scientists can construct a geographic timeline.

相似的模式在全美都存在。通过测量一缕头发中较重的氢氧同位素的比例，科学家们可以构建一个地理学的时间轴。

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Finnish youth, like their U. S. counterparts, also waste hours online. They dye their hair, love sarcasm and listen to rap and heavy metal.

芬兰青年们也像他们的美国同龄人一样，不限时上网，染头发，说话带脏字，喜欢说唱乐和重金属。

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The black eye socket , U-turn are turned! Grey hair! Come!

黑眼圈，掉头发！白发！都来啦！

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You can also buy her new line of "Hair U Wear" wigs.

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As women grow older they tend to wash their hair less often, either because they want to avoid fading chemically dyed hair or because their lifestyle has changed, says David Rubin, vice president of U.S. hair at Unilever.

WSJ: Old Hair Days: Products to Help Manage Gray and Thinning Hair

Honeywell ( HON - news - people ), restaurant and hotel group Carlson, hair salon franchiser Regis and a large U.S. mining company.

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