The Cretacious period isn't as hot as the Jurassic. 白垩纪没有侏罗纪炎热。 The temperatures are still hotter than today, but the relatively cooler climate allows the dinosaurs to be more active. 气温仍比如今要高，不过相对凉爽的...
Pachyrhinosaurus like pretty much all members of the Ceratopsian family have no weaponry from behind their neck backwards. 肿鼻角龙和角龙家族的所有成员一样，从颈部往后没有什么武器。 From their neck back, they're completel...
With the breaking up of the continents, the oceans moved closer to what is now North America, causing a dramatic increase in rain. 随着大陆的分离，海洋愈发靠近如今的北美洲，导致降水的急剧增加。 The herd is forced to the...
70 million years ago,Albertosaurus was the most fearsome hunter in North America. 七千万年前，阿尔伯特龙是北美洲最可怕的猎手。 It was one of the few dinosaurs that would take on the horned Arctic dinosaur. 它是少数敢于攻击...
The horn of the Pachyrhinosaurus could have been as long as a meter. 肿鼻角龙的角可能有一米长。 Many paleontologists think it was shaped like a rhinoceros horn, but much larger. 很多古生物学家们认为它的形状和犀牛角相仿，...
Albertosaurus hunted in small groups of up to five. 阿尔伯特龙小群狩猎，每群多可达五头。 A herd of Pachyrhinosaurus would have been more than capable of standing their ground against a single Albertosaurus. 一群肿鼻角龙面对一...
So when we find all these shed teeth of Albertosaurus in Pipestone Creek, it shows us that the Albertosaurus were scavenging, just as any decent meat eater will do, it's meat that doesn't fight back. 所以当我们在派泊斯通溪发现这么多阿尔...
In order to understand the hunting methods of Albertosaurus, paleontologists compared its brain design to that of modern animals. 为了了解阿尔伯特龙的狩猎方式，古生物学家将其脑部构造与现代动物进行比较。 The brain s...
The next key feature was a pair of short, but powerful arms. 下一个关键特征是它短而有力的前肢。 Although the arms of Albertosaurus were small compared to its overall body size, they were still packed in muscle. 尽管阿尔伯特龙的...
It was a species of Tyrannosaur. 这是暴龙的一种。 That suggested to us, well, maybe these Tyrannosaur teeth are in fact from animals that are trampling the bodies of these things as they eat them. 那就表明，也许这些暴龙牙齿是它们...
