[ti:Scientists Find First Baby Remains from Tyrannosaurus Group] [by:www.51voa.com] [00:00.00]更多听力请访问51VOA.COM [00:00.04]For the first time, scientists have found the remains of babies [00:07.60]from the group of meat-eating dinosaurs [00:11.32]that includes Tyrannosaurus rex. [00:14.80]Researchers said recently that the jaw and claw bones [00:20.80]show that the large babies [00:23.44]looked a lot like adults and were “born ready” to hunt. [00:28.76]The bones, also called fossils, represented [00:34.20]two species from the group called tyrannosaurs. [00:39.72]Tyrannosaurs were the top hunters in Asia and North America [00:45.96]toward the end of the dinosaur age. [00:50.40]The bones suggested that these babies were bigger [00:54.84]than any other known dinosaur babies. [00:58.40]They were probably around one meter long. [01:01.96]They came from what must have been very large eggs, [01:07.08]perhaps larger than the largest dinosaur eggs currently known, [01:12.84]which are about 43 centimeters. [01:17.36]The jawbone is around 77 million years old [01:22.64]and about 3 centimeters in length. [01:26.56]It was found in Montana and may belong to a species [01:32.12]called Daspletosaurus. [01:34.72]The claw is around 72 million years old. [01:39.36]It came from Canada and may belong to a species [01:44.72]called Albertosaurus. [01:47.52]Both of these species are believed [01:51.32]to be smaller cousins of Tyrannosaurus rex. [01:56.44]The largest known tyrannosaurs were over 12 meters long. [02:03.04]Greg Funston of the University of Edinburgh [02:07.20]was the lead writer of the research [02:10.60]that appeared in the Canadian Journal of Earth Sciences. [02:16.48]He said the scientists were surprised [02:19.56]at how similar the bones were to older tyrannosaurs. [02:24.96]Funston noted that the jaws had working teeth. [02:29.44]“So although we can’t get a complete picture, [02:33.80]what we can see looks very similar to the adults,” he said. [02:39.04]It appears that tyrannosaurs, Funston added, were “born ready to hunt, [02:46.24]already possessing some of the key adaptations [02:50.92]that gave tyrannosaurs their powerful bites.” [02:54.84]Adaptation is a term that means a change in an animal [03:00.32]that makes it better able to live in a particular place or situation. [03:07.52]Funston said it was “likely” that the baby tyrannosaurs [03:13.08]“were capable of hunting fairly quickly after birth, [03:17.56]but we need more fossils to tell exactly how fast that was.” [03:24.08]I’m John Russell. 更多听力请访问51VOA.COM