纪录片部落--纪录片《[PBS纪录片]挖骨机BoneDiggers-1080P高清迅雷网盘下载》高清百度云1080p下载
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：挖骨机Bone Diggers-1080P高清迅雷网盘下载
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???PBS发行的科学纪录片作为PBS Nova系列的一部分在2007年播出-英语旁白Science Documentary published by PBS broadcasted as part of PBS Nova series in 2007 - English narration
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NOVA将观众带到澳大利亚的内陆地区，寻找世界上最离奇的史前生物之一-名为Thylacoleo的巨型掠夺性有袋动物的难以捉摸的骨头。澳大利亚一流的古生物学家忍受着极端的天气，诡异的水滴落入一个深深的洞穴以及化石偷猎者的威胁，因为他们发起大胆的探险来寻找这种稀有的巨兽。在一百万年前的冰河时期，澳大利亚是一个动物园的家园。非同寻常的巨型动物，包括高8英尺的袋鼠，袋熊大小的河马，直径3英尺的蛇和像大众汽车一样大的有角乌龟。但是没有人比吃肉的有袋狮子狮子thylacoleo更奇怪或更可怕。一磅一磅，这种生物在所有活着的或灭绝的哺乳动物中咬得最厉害。它的叮咬等于今天更大的非洲狮子的叮咬。但是，尽管它曾是澳大利亚古代掠食者的国王，但最终还是被Thylacoleo推翻了王位，与所有其他超大型野兽一起丧命。是什么使那么多非同寻常的巨兽被遗忘了？在《骨头挖掘者》中，NOVA与澳大利亚探险队一起寻回了一个罕见的完整的食肉有袋动物骨骼。对其骨骼的分析为thylacoleo的许多特殊性提供了新的亮点，尤其是它如何攻击猎物的问题。最后，该节目深入挖掘了最终使巨大的冰河世纪生物不知所措的奥秘，以及早期人类猎人是否负有责任的奥秘。冒险始于古生物学家约翰·朗（John Long）收到来自业余探险家的电子邮件，并附有一张诱人的照片。这张照片显示了在内陆偏远洞穴深处的thylacoleo骨骼完好无损。由于以前没有人发现过完整的骨骼，因此这一发现将是古生物学的里程碑。因此，朗和他在西澳大利亚州博物馆的同事们进行了艰苦的探险，穿越荒凉的纳拉伯平原，以查明电子邮件中所示的偏僻洞穴。在接下来的三个星期中，研究小组在探索古老洞穴的危险凹穴时，发现了大量非凡的化石遗骸，包括几个保存完好的惊人的Thylacoleo骨骼以及先前未知的巨型袋鼠物种。开始研究骨骼，并制作有袋狮子的独特解剖结构和行为图。尽管袋鼠和考拉等大多数有袋动物是食草动物，但thylacoleo却是完全不同的食肉动物，这是一种可怕的食肉动物，前齿像钳子，前爪尖锐。但是它的建造不像狮子。低矮的身体和短的腿，它永远不可能高速追赶猎物。取而代之的是，它可能在埋伏中等待着下一顿饭，也许是从树上掉下来的。在《骨头挖掘者》的最后一幕中，NOVA调查了thylacoleo以及其他所有澳大利亚巨人失踪的奥秘。正是在这种大范围的灭绝发生时，一场激烈的争论才开始。在大约30,000年前的冰河时代的高潮时期，争论者之间争论较晚，那时气候压力本来就特别严重。NOVA takes viewers to the stark Australian outback in search of the elusive bones of one of the world's most bizarre prehistoric creatures—a giant predatory marsupial called Thylacoleo. Australia's leading paleontologists endure extreme weather, treacherous drops into a deep cavern, and the threat of fossil poachers as they launch a daring expedition to find the rare megabeast.During the Ice Age a million or more years ago, Australia was home to a zoo of extraordinary giant animals, including eight-foot-tall kangaroos, wombats the size of hippos, snakes three feet in diameter, and a horned tortoise as big as a Volkswagen. But none was quite as bizarre or fearsome as Thylacoleo, the meat-eating marsupial lion. Pound for pound, this creature had the most powerful bite of any mammal, living or extinct—in fact, its bite was equal to that of a much bigger African lion today. But even though it was the king of ancient Australian predators, Thylacoleo was eventually toppled from its throne, dying out along with all the rest of the outsized beasts. What happened to drive so many extraordinary megabeasts into oblivion?In "Bone Diggers," NOVA joins the Australian expedition to retrieve a rare intact skeleton of the meat-eating marsupial. The analysis of its bones throws new light on Thylacoleo's many peculiarities, notably the question of how it attacked its prey . And, finally, the show digs into the mystery of what finally overwhelmed the giant Ice Age creatures and whether early human hunters were responsible.The adventure begins when paleontologist John Long receives an e-mail from an amateur explorer with a tantalizing photo attached. The photo shows an apparently intact skeleton of Thylacoleo in the depths of a remote cave in the outback. Since no one has found a complete skeleton before, the discovery would be a paleontological milestone. So Long and his colleagues at the Western Australian Museum set out on an arduous expedition, crossing the desolate Nullarbor Plain to pinpoint the remote cave shown in the e-mail. Over the next three weeks, exploring the dangerous recesses of the ancient cavern, the team finds a remarkable trove of fossil remains—including several astonishingly well-preserved Thylacoleo skeletons together with previously unknown species of giant kangaroo.Back in Perth, the team begins studying the bones and building up a picture of the marsupial lion's unique anatomy and behavior. Although most marsupials such as kangaroos and koalas are herbivores, Thylacoleo was something completely different—a fearsome predator with pincer-like front teeth and a slashing front claw on its thumb. Yet it wasn't built like a lion; with its low-slung body and short legs, it could never have chased its prey at high speed. Instead, it probably waited in ambush for its next meal, perhaps dropping from trees.In the final scenes of "Bone Diggers," NOVA investigates the mystery of Thylacoleo's disappearance and that of all the other Australian giants. A fierce controversy turns on when exactly this continent-wide extinction occurred. The debate is split between advocates for a late date at the cold climax of the Ice Age some 30,000 years ago, when climate stresses would have been particularly severe. The competing camp claims the extinction was much earlier, around 50,000 years ago, when the climate was milder and the first humans arrived in Australia. While it's unlikely that humans could have directly over-hunted all the huge animals, Aboriginal hunters may well have set fires that gradually changed the profile of vegetation in the outback, making it harder for Thylacoleo's prey to get by. Although it was the king of beasts, Thylacoleo was probably vulnerable to shifts in the food chain.Whichever theory is correct, the riddle has implications that stretch beyond Australia. Creatures like woolly mammoths, mastodons, cave bears, giant sloths, and many other species all died out on other continents as the Ice Age ended and human populations expanded. The jury is out on just how big a role human predation played both in Australia and on the worldwide stage.From the gripping discovery in the desert cavern to the detective work in the lab, "Bone Diggers" takes NOVA viewers on a paleontological "CSI," unraveling a prehistoric puzzle that has eluded paleontologists for a century.
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【技术参数】——
视频编码: XviD
比特率: 1453 kbps
Video 分辨率: 720x400
音频编码: MP3
音频比特率: 135 KB/s
分集时长: 00:52:17
分集数: 1
体积: 599 MB
发布人： SoS【Technical Specs】——
Video Codec: XviD
Video Bitrate: 1453 kbps
Video Resolution: 720x400
Audio Codec: MP3
Audio BitRate: 135 KB/s
RunTime: 00:52:17
Number Of Parts: 1
Part Size: 599 MB
Ripped by SoS
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相关纪录片：
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Links
Release Post
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Official Website
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Prehistoric Predators
Walking with Beasts
What Killed the Mega Beasts
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