Earth teems with a staggering variety of animals, including 9,000 kinds of birds, 28,000 types of fish, and more than 350,000 species of beetles. What explains this explosion of living creatures—1.4 million different species discovered so far, with perhaps another 50 million to go? The source of life's endless forms was a profound mystery until Charles Darwin brought forth his ...$7分吧。前半部分讲用进废退，后面讲DNA switch，结合的示例是鱼上大陆，人类的拇指和脑（咀嚼肌退化）。基因开关这个估计很多人都没听说过，很值得科普。无字幕PBS-NOVA-2009-What Darwin Never Knew-720p。关于进化导致人类无法避免的bug，知乎上有篇高赞值得看看$其中很牛逼的一句话：“Scientists now realize that not all genes are created equal.” —— 哈哈哈哈！！（不过不要误解，说的是生物体自身基因相互之间的从属关系，可不是你的基因和我的基因之间的从属关系，XD）$后半段很不错，各种DNA证据给对进化论质疑的神棍们一记耳光。$eureka moments$非常棒的片子，DNA、基因科学的发展会不会让人类的未来充满不确定性，最终毁掉自己。长着翅膀的人，用人的双脚走路的动物，基因植入在未来会带给我们什么？期待ing。。。
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