I have this theory that, to us the world is a flat thing we stand on, but to birds it is a cliff they cling to, a huge ball and they cling to the side and then fall off and fly and glide.

我有一种想法，就是对我们来说世界是一个我们所站立的平坦的东西，而对鸟来说是一个它们所依靠的峭壁，一个巨大的球，它们依靠在边上，然后离开、飞翔、滑行。

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That's according to a new theory that says this smaller moon eventually went careening into our moon and is still there, in the form of mountains on its far side.

根据新理论学说，这个较小的伴月最终倾斜进入我们熟悉的月球，并且以山脉的形式一直处在月球的远端。

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In theory this should spur cooperation between the approximately 1.3 billion people who live in the river basins on either side of the Himalayas.

理论上讲，这将促进喜马拉雅山脉山麓两边河流流域约13亿人的合作。

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Given both supply-side economic theory and the examples provided by Texas and South Dakota, it is clear that Kansas needs to eliminate both its personal and its corporate income taxes.

FORBES: Kansas Desperately Needs Fundamental Tax Reform

An interest in the academic side of market theory led Neeti Nundy to Wall Street after she graduated from the Massachusetts Institute of Technology in 2002.

FORBES: Life After Wall Street

But there is a flip side to this theory.

FORBES: Biogen IDEC's Twisted Logic