For most females of the Cretaceous, finding a mate who's stronger, more cleverer,对于白垩纪的大多雌 ...

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The arctic fox's fur is changing from white to brown, making it incredibly well camouflaged against ...

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The chicks are just a few weeks old and growing fast.小鱼鹰只有几周大小，但是长得飞快。In another mo ...

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It's now autumn.秋天到了。The bull elk's antlers are completely free of velvet.这头雄性驼鹿的鹿角上 ...

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As the season rolls on, days grow longer in the forests.随着季节变化，森林里白天越来越长。Two of the ...

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Kell was born to a life underwater... Long ago his ancestors left the land and took to the sea.凯尔 ...

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They'll do over 100 each day.每天它们需要下潜一百多次。Walruses have a unique technique for exposing ...

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For egg-laying animals, it's almost always in the late spring or summer.对卵生动物来说，一般都会在晚 ...

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Tyrannosaurus Rex is a carnivorous monster that uses sheer force to overpower well-defended prey.雷 ...

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This kill will feed the entire wolf pack, but soon they will need to hunt again.这次捕杀能使整个狼群 ...

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As the sea ice melts away from Greenland shores, massive icebergs fall from the island's coastal gla ...

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For protection, Deinonychus relies primarily on its brain.出于自我保护，恐爪龙主要依靠其大脑。The br ...

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Here, as Mara weakens from lack of food, Kell grows stronger by the day.在这里，当玛拉因为食物缺乏而 ...

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It's all about getting your genes in the next generation.你只想把自己的基因传给下一代。Evolution ten ...

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I am a flower.我是花。Yes, I'm beautiful. I've heard it before and it never grows old.是的，我很美。 ...

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From April to July is the peak hunting season for bears when they eat almost ninety percent of their ...

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The hungry wolves are not far behind.饥饿的狼群就在后面不远。For the mother, it's too late and the h ...

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Tyrannosaurus Rex means "tyrant lizard king.""雷克斯霸王龙"意为" ...

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When a Goliath like this is fully grown, even the most vicious predators keep their distance,当这样 ...

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Located in the North Atlantic, Iceland consists of over thirty active volcanic systems, few other pl ...

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