达尔文所不知道的事 (2009)

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 revolutionary idea of natural selection. But Darwin's radical insights raised as many questions as they answered. What actually drives evolution and turns one species into another? To what degree do different animals rely on the same genetic toolkit? And how did we evolve?"What Darwin Never Knew" offers answers to riddles that Darwin couldn't explain. Breakthroughs in a brand-new science—nicknamed "evo devo"—are linking the enigmas of evolution to another of nature's great mysteries, the development of the embryo. NOVA takes viewers on a journey from the Galapagos Islands to the Arctic, and from the explosion of animal forms half a billion years ago to the research labs of today. Scientists are finally beginning to crack nature's biggest secrets at the genetic level. The results are confirming the brilliance of Darwin's insights while revealing clues to life's breathtaking diversity in ways the great naturalist could scarcely have imagined. 世界之大无奇不有，存在着好多超出人类认知的事情，尊重世界上每一个个体和小众！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。。。社会生物学和基因理论对达尔文进化论的补充与完善，表现手法比较形象，但深度不足。一个感觉是，达尔文在证据不足的情况下，根据理论演绎所做出的推断，具有惊人的前瞻性，虽然这在当时可能受人攻击，但最终却被证明是正确的——当然这不是那种神棍式的自洽想像，而是像根据数学演算后预先推断出海王星的存在。这需要有强大的抽象逻辑思维和理论演绎能力作为支撑。2013.4.21 Biology class talking about Darwin finches over 20 years of changes7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基因的密码，我们不过是一堆代码编造出来的程式，改变碱基配对就会改变我们的外貌和功能。结合最近的贺建奎基因改造事件来说，人类基因编辑是早晚的事，会在好奇心和道德感并存的情况下妥协发展。阴谋论的支持者有外星人造人论的假说，试想一下，如果我们发现了某星球存在低级生物，是否会把我们的基因和当地的基因结合创