标签:灭绝 相关文章
Mountain Birds Will Die Out as Planet Warms Scientists have recreated a 1985 study of birds in Peru that shows climate change is pushing them from their natural environment. 科学家再现了1985年在秘鲁进行的一项鸟类研究,这次研究表
Video Shows Man Believed to be Last of Amazon Tribe Brazils Indian Foundation has released a video that shows images of a man believed to be the last surviving member of his tribe. No one knows the mans name or that of his tribe. It appears he has li
Alligator gar are the second largest freshwater fish in North America. Later it disappeared from the state's waterways in the 1990s. 鳄雀鳝是北美第二大淡水鱼。后来,也就是20世纪90年代的时候,水域中就再没发现过这种鱼
1. generation,世代,一代。 eg:The antiques have been handed down to them from one generation to another. 这些古董世代相传传到了他们手里。 2. mass,大量的,大规模的,大批的。 mass extinction,物种大灭绝。 eg:We want to
Giant long-necked Sauropods were able to browse at treetop levels, while other plant eating dinosaurs were perfectly adapted to take advantage of the low-growing vegetation. 巨大的长颈蜥脚类恐龙能够吃树顶上的嫩枝,而其它的植食
The thing about extinction events is that, of course they're very bad for the animals that go extinct, but they open up a door of opportunity for a lot of other animals and plants. 其实就灭绝事件来说,当然对走向灭绝的动物来说很糟
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
Tenontosaurus was bigger and certainly heavier. 腱龙体型庞大且笨重。 Tenontosaurus didn't necessarily make a mistake. 它不一定是犯了致命的错误。 It was numbers that took him down. 它是败给了庞大的数量。 One dinosaur
Normally, the lion would hunt at night, to help it ambush its prey and to save energy. 通常,拟狮在夜间狩猎,这有助于伏击其猎物并节省体力。 Hunger had pushed it to hunt by day when the bear is awake and hunting as well. 饥饿
Animals at Risk: Who Cares? An animal species becomes extinct when it fails to produce enough young is each generation to keep pace with the death-rate. We can tell from fossil evidence in rocks that
Unfortunately for the therapsids, their cousins the diapsids were also productively evolving, 兽孔目爬行动物的运气不佳,它们的表亲双孔亚纲在进化过程中也繁殖力很强, in their case into dinosaurs (among other things),
本期内容: Around 500 tons of the oysters are clogging parts of the Scandinavian coast, threatening native species. In jest, Denmark's embassy in China turned to social media, inviting Chinese tourists to eat the shellfish. The post has received
For complex organisms, the average lifespan of a species is only about four million yearsroughly about where we are now. 对于复杂动物来说,一个物种的平均寿命只有大约400万年大致相当于我们人类迄今存在的时间。 Ex
Hello, again, and welcome. Im Jim Tedder in Washington. Our program today is all about animals. First we will hear about a group of people who are working to save the African elephant from poachers. New money and new ideas are involved in the project
Its a really long way to go for coffee, but the coffee these scientists are looking for you wont find at your local cafe. This is a rare wild relative that grows in the jungles of Sierra Leone. Coffee has 124 of these cousins across tropical Africa a
What all this leaves us with, as one researcher has put it, is tons of conjecture and very little evidence. 这一切留给我们的,正如一位研究人员所说,是大量的猜测和很少的证据。 Cooling seems to be associated with at lea
Two points need to be kept in mind. 我们需要记住两点。 First, these are all just informed guesses. 第一、这些都仅仅是根据资料作出的推测。 Estimates for the number of animal species alive at the end of the Permian range fro
Earth has seen five major extinction episodes in its time the Ordovician, Devonian, Permian, Triassic, and Cretaceous, in that order and many smaller ones. 地球已经目睹了5次大的灭绝事件依次在奥陶纪、泥盆纪、二叠纪、三叠纪
At a depth of ten meters, we walked amid a swarm of small fish from every species, more numerous than birds in the air, more agile too; 在十米深的地方,我们就走在一大群各种各类的小鱼中间,比空中飞乌的数量还多,也更
听力文本 Recording 29 录音29 What I appreciate most about my work is the fact that I can turn the fossils I find into information we can actually use. 我对于自己的工作中最欣赏的一点是,我能把我找到的化石转化成我们能