科学家研究蚁群，鸟类，哺乳动物群和鱼类去了解简单的天才这样的动物蜂群。
Scientists study ant colonies, bird flocks, mammal herds, and fish schools to understand the simple genius of such animal swarms.
一些专家指责，这些克劳·维斯人对狩猎的渴望是猛犸象、乳齿象以及巨型哺乳动物群从大陆突然消失的原因。
Their thirst for hunting is blamed by some experts for the sudden disappearance of mammoths, mastodons and other large 'megafauna' mammals from the continent.
的确，鹰能从数英里的高空轻松发现小块哺乳动物群，并疾速下降捕捉必要的猎物来幸存或哺育后代。
Indeed, hawk can spot a small ground mammal miles high in the sky with ease, descending so rapidly and then taking of the prey necessary to survive and feed our young.
现在的问题是--如果遗传科研人员的论断正确无误,那么现存的哺乳动物群就不是起源于始新世时代了.
The trouble is that if the genetics researchers are right, these modern groups did not actually originate in the Eocene.
现在的问题是--如果遗传科研人员的论断正确无误,那么现存的哺乳动物群就不是起源于始新世时代了.
The trouble is that if the genetics researchers are right, these modern groups did not actually originate in the Eocene.
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