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ANDREW BERRY: Evolution by natural selection. This is an idea that has been sought after since the dawn of human thought. And it was a theory that was discovered by two people, and we've...

安德鲁·贝里：自然选择的进化。这是一个想法自拂晓起便备受追捧人类思想。这是一个理论由两人发现，我们玩得很开心忘记了其中一个。到底发生了什么事可怜的老阿尔弗雷德·拉塞尔·华莱士？乔治·贝卡洛尼：阿尔弗雷德·拉塞尔·华莱士生于1823年在一间小...

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The malaria parasite is an ancient organism. It has been with us since before we were human. Famous victims include Alexander the Great Genghis Khan and George, Washington. The malaria lifecy...

疟原虫是一种古老的生物。在我们成为人类之前，它就一直伴随着我们。着名的受害者包括亚历山大大帝成吉思汗和乔治华盛顿。疟疾的生命周期遵循一条曲折的道路，在蚊子和人类之间来回切换。这只蚊子感染了疟原虫。因为她怀孕了，她开始渴望人类的血液。在叮咬过...

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Many years ago,a young man named Giovanni Guasconti left his home in Naples to study in northern Italy.He rented a small room on the top floor of a dark and ancient palace.Long ago, the building had b...

许多年前，一位名叫Giovanni Guasconti的年轻人离开他在那不勒斯的家，前往意大利北部学习。他在一座黑暗而古老的宫殿的顶层租了一间小房间。很久以前，这座建筑属于一个贵族家庭。现在，一位名叫利萨比塔夫人的老妇人把它的房间租给了帕多...

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[NARRATOR:] Mosquitoes are usually vegetarian, preferring to drink nectar, fruit juices, and honeydew. Only a pregnant mosquito will bite humans, seeking nutrients from blood to nourish he...

[旁白：]蚊子通常是素食主义者，喜欢喝花蜜，果汁和蜜露。只有怀孕的蚊子会咬人，从血液中寻找营养以滋养她正在发育的卵子。如果她喝了血感染疟疾的人，她也被感染了与疾病。一滴血填满昆虫的胃到处都是疟疾寄生虫。致命的寄生虫形式人类内部无法生存在蚊子...

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SEAN CARROLL: For tens of thousands of years, much of North America lay buried under ice up to a mile thick. Then the massive ice sheets receded. In what is now Alaska, ocean bound stream...

肖恩·卡罗尔：几十块钱几千年来，北美大部分地区都被埋葬了冰层厚达一英里。然后大规模冰盖消退了。在现在的阿拉斯加，海洋束缚的溪流和河流出现，开放新的可能性对于无数物种来说。其中一种动物那是召唤那三根刺是不是棘鱼。常见于北方大海，这条小鱼在淡水...

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So the basic concept is that heat inside the Earth drives motions. We have convection currents, through which heat is dissipated from the interior of the Earth. Those convection current...

所以基本概念 是地球内部的热量吗 驱动运动。 我们有对流 currents，通过 热量从 地球内部。 那些对流 然后产生影响 关于地表发生的事情。 因此，对流 上升，地球表面 实际上是 f...

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TYLER LYSON: Even though I've collected thousands and thousands of dinosaur bones and other fossils, every fossil that I find, it's just quite a thrill because you're the first person ...

TYLER LYSON：偶数 虽然我已经收集了 成千上万 恐龙骨骼 和其他化石，每个 我找到的化石， 这真是太刺激了 因为你是第一个 从来没有见过 特殊的恐龙骨骼。 然后是很多 因为那样就有趣 ...

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Earth’s temperature is affected by a process called the greenhouse effect, which is how the atmosphere keeps our planet’s surface warm. This process begins with energy from the sun, which is m...

地球的温度受一个过程的影响 称为温室效应，这就是 大气层使我们的星球表面保持温暖。 这个过程从来自太阳的能量开始， 它主要以可见光的形式出现。 当这些能量到达地球时，一些能量会被反射 通过大气层或地球表面 然后...