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A closer inspection of the Tenontosaurus revealed cuts and slashes in the bone, made by the teeth of Raptors. 仔细检查腱龙骨骼能发现迅猛龙造成的伤口和齿痕。 Proof that there were more than four Raptors in this pack. 这说明这群
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Because Tenontosaurus has that long tail, it's a clear sign that it is designed to be more of a weapon. 腱龙长长的尾巴很明显是非同寻常的武器。 So it's got a great way to defend itself. 所以是保障自身安全的好办法。 Tha
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Then, Ostrum's crew made another discovery - lying next to the Raptor was a second skeleton. 紧接着，奥斯特伦姆的团队有了另一个发现，在迅猛龙旁边还有第二具骸骨。 Two Raptors, side by side. 两头迅猛龙紧挨着。
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His favorite hunting tactic is to come from below and behind his potential prey. 它最喜欢的狩猎策略就是从它潜在猎物的下方或者后面下手。 As the Meg closes in on the whale, he descends, in order to surprise him from below. 随着
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One of the things that tells us that it's actually a more primitive dinosaur. 这一点说明它是一种较为原始的恐龙。 Now, the third and forth fingers are very small, probably not very functionally effective. 它的第三和第四只手指很
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There's a huge difference in the fact that the whales would have sonar and could use that to detect food. 鲸类能够用声纳来探测食物的事实带来了巨大区别。 Megalodon on the other hand doesn't have that advantage, 而巨齿鲨就没有
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The landscape of modern Utah scarcely resembles the landscape of 156 million years ago, when Allosaurus ruled supreme, there were fewer mountains. 现代犹他州的地形跟一亿五千六百万年前大相径庭，在异特龙称霸之时，那里没
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Well, the answer is amber - fossilized tree sap. 答案是琥珀，树液的化石。 We find all kinds of prehistoric insects, plants, and even small reptiles trapped within amber. 我们能发现琥珀里面裹着各种史前昆虫、植物甚至小型
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They were the elite, the predators that ruled the earth. 它们是精英，是统治地球的掠食者。 They ranged from the giant T-Rex, who relied on size and long curved teeth, to the smaller Raptors, who used speed and cunning. 它们中有霸王
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We see the same sort of behavior among lions where the male will simply act as a distraction to drive prey towards the awaiting female. 我们在狮群中见到类似行为雄狮只是起干扰作用把猎物赶向等待着的雌性。 It's a great w
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We can look at modern jaguar to see animals that sort of play the same role that Ceratosaurus does. 我们可以参考现代的美洲豹，来看一看差不多扮演着角鼻龙角色的动物。 Jaguars take on medium to smaller prey, but it's hesi
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In 2007, paleontologists of Manchester University made a breakthrough discovery. 在2007年，曼彻斯特大学的古生物学家们取得了一项突破性的发现。 By studying the leg bones, musculature and mechanics behind them, they were able
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Megalodon. The largest carnivorous fish ever to prowl the oceans. 巨齿鲨。海洋中出现过的最大的掠食性鱼类。 Megalodon as a species, it receives a lot of interest. 巨齿鲨这个物种，引发了很多人的兴趣。 It is the clo
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The Allosaurus was so focused on the fact that Camarasaurus was stuck, it wasn't in top predator mode. 异特龙过于关注圆顶龙被困泥中，这一点它们没有使用顶级掠食者模式。 That meant it got in too close. 就是说它们靠得
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Under the intense heat of the Jurassic sun, scientists believe an unseen force would begin to take its toll. 在侏罗纪烈日的曝晒之下，科学家们相信一种不可见的力量会发挥其威力。 The massive size of these Allosaurus make
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Gastonia lowers his body to protect his underside. 加斯顿龙伏低身体保护身下。 His tail is heavily armored, but its powerful muscles are able to move it with surprising speed. 它的尾巴全副武装，但其有力的肌肉能带动尾巴以
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You really want to detect a predator before it gets close enough for you to be able to see it and so they potentially used other senses like the sense of smell. 它们确实会想在掠食者靠近得能够看见之前就探测到它，所以它们潜在
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Along with its enormous size, one feature set T-Rex apart from all other meat eaters- true binocular vision. 除了其巨大的身躯外，有一个特点让霸王龙从所有肉食者中脱颖而出真正的双目视力。 It had forward focusing vi
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Along with its deadly claws, Utahraptor relied on its teeth as an effective means of killing its prey. 除了其致命的爪子外，犹他盗龙凭借它的牙齿作为一个杀死猎物的有效工具。 And to ensure it always had a fresh set, Uta
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Over the next 90 million years, a new era called the Cretaceous period dawned. 在接下来的九千万年里，开始了一个叫做白垩纪的新时期。 Broader-leaf plants that could tolerate seasonal weather changes covered the land. 能够忍受
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