And because we already had evolutionary pressure to sleep, the theory goes, the brain evolved to use that time wisely by processing information from the previous day: acquire by day; process by night.

既然因为我们已经有了睡眠的进化压力，进化理论说明，大脑就进化到明智使用睡眠时间来处理前一天获得的信息：白天获取，夜晚处理。

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Last time we talked about the false belief that evolutionary theory says human beings descended from monkeys.

上次我们谈论到了关于人类进化论的错误观念：人类是猴子演变而来的。

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But despite the passage of time and the accumulation of supporting data, teaching evolutionary theory in the classroom is still a hot-button issue in some U.S. schools.

纵使时间推移，数据累积，在美国的一些学校，进化论能否进入课堂仍是一个热点问题。

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Traditional evolutionary theory suggests that one feature -- a tail for instance -- would slowly evolve over time.

CNN: Pterodactyl fossil fills gaps in evolutionary tale