Using information from the investigation following the dropping of the first atomic bomb on Hiroshima on August 6, 1945, this documentary outlines the immediate 24 hours following the massive explosion. The first atomic bomb contained 140 lbs of enriched uranium and reduced the downtown to a wasteland with 70,000 people killed immediately. Another 40,000 died three days later when a second bomb was dropped on Nagasaki. The Army spent 10 weeks studying the impact of the explosion focusing on thermal flash. The immediate impact was that some were vaporized leaving only atomic shadows. Triangulating these led them to conclude that the bomb exploded only a few hundred yards from its intended target. There was heavy damage for 3 miles in every direction. A great many were burned but there was very little information about radiation poisoning at the time. Today, scientists are still studying but the study continues today with the study of 120,000 Hiroshima survivors.

科学家们利用DNA技术证明所有的人类拥有共同的祖先，为此他们来到人类的摇篮——东非。 Scientists use the DNA from a random group of people to show that all humans share common ancestors. On a single day on a single street, with the DNA of just a couple of hundred random people, National Geographic Channel sets out to trace the ancestral footsteps of all humanity. Narrated by Kevin Bacon, The Human Family Tree travels to one of the most diverse corners of the world -- Queens, N.Y. -- to demonstrate how we all share common ancestors who embarked on very different journeys. Regardless of race, nationality or religion, all of us can trace our ancient origin back to the cradle of humanity, East Africa. What did our collective journey look like, and where did it take your specific ancestors? At what point in our past did we first cross paths with the supposed strangers living in our neighbourhood? Now, in The Human Family Tree, the people of this quintessential American melting pot find out that their connections go much deeper than a common ZIP code.

国家地理频道（国际） (National Geographic Channels International, NGCI) 透过不断创新的节目，邀请全球观众一起重新思考对于原来认知的电视及世界的看法。\r\n国家地理频道于1997年9月首先在欧洲成立，而后陆续在亚洲、拉丁美洲和美国开播。 目前，全球有171个国家及地区,超过4亿4千万个家庭用户，可以通过48种语言收看到国家地理频道。 \r\n凭借无与伦比的视觉品质和引人入胜的故事情节，国家地理频道荣获了多项专业纪录片制作大奖，其中包括一次奥斯卡金像奖和两次金像奖提名，129座艾美奖和超过1000个影视媒体专业奖项，制作水准自然毋庸置疑。国家地理频道独一无二的精彩节目将继续利用令人信服的故事，精美生动的画面，引领观众到达未知的领域，使高品质观众期待更多。 \r\n国家地理频道的节目内容主要涵盖：最新科学与尖端科技、历史与人文、焦点事件调查、自然野生、主题系列特别呈现等。

天朝国家地理

简介：在原始的印度丛林里，独行狩猎的老虎在其各自的领域称王。让我们跟着镜头捕捉它的神秘踪迹，观赏勇猛迅捷的它在狩猎时是如何潜近、埋伏与偷袭猎物，以及在老虎国度里，许多野生动物之间互相掠食的关系。片中，您亦将看见其等待猎物时超凡的耐心和照顾幼虎时细心温柔的一面。请您一同深入虎域遨游，尽情欣赏丛林之王的赫赫英姿。

北极狼群荒野生活的亲密纪录 加拿大的埃尔斯米尔岛，距离北极不到五百哩。在这酷寒的极地，只有极特殊的动物才能生存，白狼就是其中之一。在世上其他地区，狼群饱受人类的迫害而对人类深怀戒心，难以靠近观察。然而此地人迹罕至，白狼徜徉在冰冷荒原上悠然自得，对人类毫不畏惧。国家地理摄影师吉姆．布兰登勃格与研究狼群三十年的生物学家戴夫．米奇连袂前往此岛，在极为恶劣的环境下，拍摄了有史以来对狼群观察最细致、最亲密的生态纪录片

【简介】 发现猩猩世界里最惊人的秘密。 从科特迪瓦浓密苍郁的热带森林，到坦桑尼亚陡峭的山坡，科学家发现了许多有关野生黑猩猩的惊人事实：牠们能办识某些能治病的植物、联合狩猎，以及进行惨烈的领土战争、甚至出现孤独生活和掠夺同伴的极端表现。针对几个世代的深入研究，我们对牠们复杂的社会阶级结构以及独特的文化有了更重要的体认。黑猩猩的生态其实至为复杂，几与人类无异，而本片也让我们了解到，必须深入认识自然环境中的黑猩猩，以藉此了解牠们并未在转变成人的过程中失败，而是转变成了现代的人猿。

《国家地理》纪录片是全球知名的人文、地理纪录片厂牌，获得超过1000多项业界大奖和126座艾美奖，全球有166个国家与地区，超过3亿5千万个家庭用户，通过34种语言收看福克斯国家地理频道。2014年底，腾讯和美国福克斯国际电视网达成合作，2015年腾讯视频平台播放300多小时的《国家地理》纪录片，同时，腾讯视频成为国家地理在中国大陆的唯一网络专区合作伙伴。2015年，腾讯纪录片频道，邀您看见奇异新世界……