生命的起源：上
著名主持人大卫爱登堡无数次环游世界，用镜头记录下神奇的自然界。如今他八十多岁了，再次回来进行节目创作，完成他对地球生命史诗般的记录。本片关注的是稀有物种，探索生命的起源。不仅将周游世界 ，还要追本溯源，试图去探索出远古时期的生命为何状。
生命的起源：中
著名主持人大卫爱登堡无数次环游世界，用镜头记录下神奇的自然界。如今他八十多岁了，再次回来进行节目创作，完成他对地球生命史诗般的记录。本片关注的是稀有物种，探索生命的起源。不仅将周游世界 ，还要追本溯源，试图去探索出远古时期的生命为何状。
生命的起源：下
著名主持人大卫爱登堡无数次环游世界，用镜头记录下神奇的自然界。如今他八十多岁了，再次回来进行节目创作，完成他对地球生命史诗般的记录。本片关注的是稀有物种，探索生命的起源。不仅将周游世界 ，还要追本溯源，试图去探索出远古时期的生命为何状。
火星为何有可能保留了生命起源的秘密
尽管我们喜欢把外星生物想象成是小绿人，但是它们更可能会是微生物。行星学家 娜塔莉·卡布罗尔 带领我们进入到火星微生物的搜寻中，这次搜寻一反直觉地把我们带到遥远的安第斯山脉湖泊里去。那里极端的环境——稀薄的大气和焦黄的土壤——相当接近35亿年前火星的地表环境。微生物在此适应生存的方式，也许恰好能告诉我们要去火星哪里寻找它们，并且能够帮助我们理解为什么有些微生物会通向文明，而另一些则走向灭亡。
声乐学习起源的肌动模型 - Erich Jarvis P2
本视频由科普中国和生物医学大讲堂出品
Erich Jarvis (Duke/HHMI) Part 2: Motor theory of vocal learning origin
In Part 1, Jarvis explains that vocal learning is the ability to hear a sound and repeat it. Only 5 groups of mammals (including humans) and 3 groups of birds (parrots, hummingbirds and songbirds) are capable of vocal learning. Jarvis and his lab members imaged changes in gene expression in bird's brains after singing. They found that hummingbirds, songbirds and parrots each have pathways in specific areas of the brain that are not found in non-vocal learning birds. Interestingly, analogous networks exist in the human brain but not in non-vocal learning monkeys.
In Part 2, Jarvis proposes a mechanism by which vocal learning may have evolved. He suggests that the brain areas that control vocal learning are the result of a duplication of a pre-existing neural circuit that controls motor movement. A similar duplication event may have occurred during the evolution of humans with the result that both humans and Snowball, a cockatoo, can sing and dance to a beat!
In Jarvis' third talk, he demonstrates that the brain pathways necessary for vocal learning are associated with the expression of particular axonal guidance genes. He also proposes that the evolutionary events responsible for the development of vocal learning may be a general mechanism for the development of other complex behavioral traits.