双语阅读：寻找物种起源

　　There’s a cool new Web site—and iPhone app—that could come in handy in a wide variety of circumstances. It’s called Time Tree. And it tells you how closely related any two organisms are over time. In other words, it’ll tell you what the available data say is the time since any two organisms shared a common ancestor. Time Tree is jointly run by Penn State’s Blair Hedges and Arizona State’s Sudhir Kumar.

双语阅读：寻找物种起源

　　有一个非常酷的新网站，它和iPhone 应用程序一样，能在多个领域里大显身手。这个网站叫做“时光之树”。它会告诉你任意两种生物在时间长河里的亲密程度。换句话说，它会根据现有数据告诉你，这两种生物在多少年前有同一个祖先。时光之树由宾夕法尼亚州立大学的布莱尔·赫奇斯和亚利桑那州立大学的苏希尔·库马尔共同运行。

　　So let’s say you’re out for a walk in the woods, with your iPhone handy, and you run into a grizzly bear. You quickly load the app and key in the two organisms you’re interested in. Those would be you, a human, and grizzly bear, the thing that’s approaching you alarmingly fast. In just a couple of seconds, you are informed that you and the grizzly bear shared a common ancestor just 98.2 million years ago.

　　假如说你在森林中散步，手中拿着一部iPhone，迎头撞上了一头灰熊。你迅速运行iPhone程序，输入两种你感兴趣的生物。那就是你，一个人类，以及一头灰熊——它正在以惊人的'速度向你奔来。在两秒钟之后，你就会被告知这头熊和你在九千八百二十万年前有着同一个祖先。

　　If you have a computer and are just curious about the grizzly bear, go to timetree.org. The results average the findings of published papers relevant to your search and include links to the papers.

　　如果你有一台计算机，而且对灰熊感兴趣，就登上timetree.org这个网页吧。测试结果会给出从相关论文中找到的平均数据，并给出这些论文的链接。

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