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.

国家地理老虎纪录片：孟加拉虎桑达莉一家的故事。

NASA火星探路者勇气号（Spirit）以及机遇号（Opportunity）于2004年成功登陆火星；计划中三个月至半年的寻觅水源之旅，最后演变为长达五年的科学长征。火星探索车跋山涉“水”，跨越千山万岭，深入火山口底部；与沙尘暴抗争，与技术问题作战。没人能想到，这两名勇士能完成这前无古人的探索之旅。《火星五年》跟随它们的脚步，漫游火星，记录下了人类历史上最神奇的一段科学探险。