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英语听力文章：科学家深度研究恐龙巢穴
Scientists Are Learning So Much About Dinosaur Nests
张鼎成Tons of dinosaur fossils have been unearthed over the last hundred years. The long-buried bones tell us about the physical build and eating habits of dinosaurs. But to tell how dinosaurs lived and behaved, you often need more than bones. That’s why the earliest dinosaur nests found to date are giving up crets about dinosaurs that lived one hundred ninety million years ago.
3 Hundred Pound Dino通感的句子
Massospondylus, who name means “longer vertebrae,” was a two legged, omnivore that was from thirteen to twenty feet long and weighed three hundred pounds. Its small head was perched on a long neck and its forelimbs were armed with sharp thumb claws.怅望
嘴上起泡是什么原因An archeological site at Golden Gate Highlands National Park in South Africa has been a treasure trove of information for scientists. Ten nests have been unearthed at veral levels of the site. Each contains up to thirty four round eggs tightly clustered. Both eggs and dinosaur embryos have been examined.
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喝茉莉花茶Nest Building
The site not only gives us physical information, it shines some light on the behavior of the early dinosaurs. It confirms that even early dinosaurs built nests in groups, similar to colonial birds nesting today. Despite their menacing claws, Massospondylus mothers kept highly organized
nests, suggesting that they may have arranged the eggs in their nest after laying them.
如何制作信封Nest locations within the strata indicate that the dinosaurs returned to the site year after year. This behavior is known as nesting fidelity. Footprints around the nest are also giving us an idea about young dinosaur behavior. Hatchlings didn’t leave the nest site immediately, but stayed in the area until they were at least double their hatching size.
