Although dinosaurs roamed virtually

Although dinosaurs roamed virtually the whole earth for 160 million years, dinosaur skeletons are known only from a single tooth or bone chip. The reason is that it takes very special conditions to make a fossil and a lot of luck to find one.

For many years, information about Tyrannosaurus rex was sketchy at best. However, in the summer of 1990, the first nearly complete Tyrannosaurus rex skeleton ever found was excavated in the Mountana badlands. That same year a second, even more complete, skeleton was found in South Dakota. Together these skeletons yielded surprising new insights into the most famous of the dinosaurs, about the anatomy and behavior of T. rex and the world in which it lived.

Among the surprising discoveries were that T. rex was a far sleeker, but more powerful, carnivore than previously thought, perhaps weighing less than 61/2 tons, no more than a bull elephant, and that T. rex’s habitat was forest, not swamp or plain as previously believed. Moreover, there appears to have been two forms of T. rex, the male quite different from the female. Scientists hope that future fossil discoveries and increasingly more sophisticated techniques will provide more accurate and complete information about not only T. rex but all the dinosaurs, giving us a window on the world so many millions of years into the past.

Kết quả (Anh) 1:

Although dinosaurs roamed virtually the whole earth for 160 million years, dinosaur skeletons are known only from a single tooth or bone chips. The reason is that it takes very special conditions to make a fossil and a lot of luck to find one. For many years, information about Tyrannosaurus rex was sketchy at best. However, in the summer of 1990, the first nearly complete Tyrannosaurus rex skeleton ever found was excavated in the Mountana badlands. That same year a second, even more complete skeleton, was found in South Dakota. Together these skeletons yielded surprising new insights into the most famous of the dinosaurs, about the anatomy and behavior of t. rex and the world in which it lived.Among the surprising discoveries were that t. rex was a far sleeker, but more powerful, carnivore than previously thought, perhaps weighing less than 61/2 tons, no more than a bull elephant, and that t. rex's habitat was forest, not swamp or plain as previously believed. Moreover, there appears to have been two forms of t. rex, the male quite different from the female. Scientists hope that future fossil discoveries and increasingly more sophisticated techniques will provide more accurate and complete information about not only t. rex but all the dinosaurs, giving us a window on the world so many millions of years into the past.