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[National Geographic系列]：地球的诞生Birth of the Earth-1080P高清迅雷网盘下载
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??由埃里克·迈耶斯（Eric Meyers）主持，国家地理杂志（National Geographic）发行的科学纪录片，作为NG裸科学系列的一部分，于2005年播出-英语旁白Science Documentary hosted by Eric Meyers andpublished by National Geographic broadcasted as part of NG Naked Science series in 2005 - English narration
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地球如何进化以维持生命？现在，我们的星球支持需要特殊条件的大量生物，但是将这些独特条件集合在一起的一系列事件是什么呢？建立支持人类生活的世界需要做什么？塔吉什湖陨石塔吉什湖陨石于2000年1月18日撞击地球；据报道，在育空地区和加拿大不列颠哥伦比亚省北部的塔吉什湖地区发现了目击者，随后在该湖的冰冻表面上收集了500多个陨石碎片。事件后的大气照片也产生了流星的轨迹。大部分石质的含碳碎片落在湖的塔库臂上，当它们进入湖的冰冻表面时被冰包裹。当陨石落到地球上时，分析表明，它们属于原始时代，包含未改变的恒星尘埃颗粒，这些尘埃颗粒可能是形成我们的太阳系和太阳的物质云的一部分。事实证明，陨石来自我们太阳系中小行星带的外部边界。塔吉什湖陨石在受到撞击之前，其直径估计为4米，重量为56吨。但是，当发现块状巨石的碎片时，仅剩下1.3吨，这意味着大约97％的陨石在下降时就蒸发了，在此期间，流星最终以大约1.7吨的能量爆炸了。在这1.3吨碎石中，仅发现并收集了0.1％。http：//en.wikipedia。org / wiki / Tagish_Lake_meteoriteStromatolites在前寒武纪（前寒武纪）时期，地球上的层云母含量要高得多。在24亿年前，地球的大气层中富含二氧化碳。然而，前寒武纪的空气缺乏维持5.4亿年前“寒武纪爆炸”以来不断发展的复杂多细胞生命的氧气。尽管在古生代时代存在，但不常见，化石记录中的准分子在多样性和数量上都在晚期晚期急剧下降。如今，叠层石在海洋环境中已经非常罕见。结果，它们已成为有价值的“活化石”。现代叠层岩主要存在于盐度极高的湖泊和海洋泻湖中，极端条件不包括动物放牧。这样的地点之一是西澳大利亚鲨鱼湾的哈默林泳池海洋自然保护区，今天已经观察到了极好的标本。淡水叠层岩可以在墨西哥沙漠中独特的生态系统Cuatro Ci？negas中找到。http://en.wikipedia.org/wiki/Stromatoliteshttp://channel.nationalgeographic.com/channel/nakedscience/episodes.htmlHow did the Earth evolve to support life? Our planet now supports a huge diversity of living creatures requiring very special conditions, but what was the series of events that brought this unique set of conditions together? What did it take to make a world that would support human life?Tagish Lake meteoriteThe Tagish Lake meteorite impacted the Earth on January 18, 2000; the reported sighting in the Tagish Lake area in the Yukon Territory and northern British Columbia, Canada was followed-up by gathering more than 500 fragments of the meteorite, collected upon the lake's frozen surface. Post-event atmospheric photographs, also yielded the meteor trajectory. Most of the stony, carbonaceous fragments landed on the Taku Arm of the lake, becoming encased in ice as they entered the lake's frozen surface. As the meteorite fell to Earth, it set off a wide array of satellite sensors, as well as seismographs.Analyses have shown that they are of a primitive age, containing unchanged stellar dust granules that may have been part of the cloud of material that created our solar system and Sun. The meteorite has proven to have come from the outer limits of the asteroid belt in our solar system. The Tagish Lake meteorite, before it impacted, was estimated at 4 metres in diameter and 56 tonnes in weight. However, when the fragments of the massive lump of rock were found, only 1.3 tonnes remained, meaning that around 97% of the meteorite had vaporised on its descent, during which the meteor finally exploded with around 1.7 kilotons of energy. Of these 1.3 tonnes of fragmented rock, only 0.1% was found and collected.http://en.wikipedia.org/wiki/Tagish_Lake_meteoriteStromatolitesStromatolites were much more abundant on the planet in Precambrian (Pre-Cambrian) times.Prior to 2.4 billion years ago, the earth's atmosphere was rich in carbon dioxide. However, the Precambrian air lacked the oxygen that sustains the complex multicellular life that has evolved since the "Cambrian explosion" 540 million years ago. Stromatolites in the fossil record decline sharply in both diversity and number during the late Proterozoic eon, although they are present, but not common, in Paleozoic era strata. Today, stromatolites are quite uncommon in marine environments. As a result, they have become valuable "living fossils."Modern stromatolites are mostly found in hypersaline lakes and marine lagoons where extreme conditions exclude animal grazing. One such location is Hamelin Pool Marine Nature Reserve, Shark Bay in Western Australia where excellent specimens are today observed. Fresh-water stromatolites can be found in Cuatro Ci?negas, a unique ecosystem in the Mexican desert.http://en.wikipedia.org/wiki/Stromatoliteshttp://channel.nationalgeographic.com/channel/nakedscience/episodes.html
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【技术参数】——
视频编码: DX50
比特率: 1996 kbps
Video 分辨率: 432x688 (height x width)
Video 画面比例: 3x5 (1:1,59)
音频编码: MPEG-1 Layer 3 (MP3) <0x0055>
音频比特率: 192 kbps
音频串流: 1
音频语言: English
分集时长: 47 min 29,96 s (71249 Frames)
Subtitles: English
发布人：: jvt40【Technical Specs】——
Video Codec: DX50
Video Bitrate: 1996 kbps
Video Resolution: 432x688 (height x width)
Video Aspect Ratio: 3x5 (1:1,59)
Audio Codec: MPEG-1 Layer 3 (MP3) <0x0055>
Audio BitRate: 192 kbps
Audio Streams: 1
Audio Languages: English
RunTime: 47 min 29,96 s (71249 Frames)
Subtitles: English
Ripped by: jvt40
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发表于 2020-7-13 23:28:53
发表于 2020-7-27 08:25:35