路人甲
[爬行類] 高級會員
UID 2531
精華
2
積分 636
帖子 486
閱讀權限 70
註冊 2007-7-25
來自 香港
狀態 離線
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[廣告]:
Photo Gallery: Jurassic Period
The Jurassic period (199.6 million to 145.5 million years ago) was characterized by a warm, wet climate that gave rise to lush vegetation and abundant life. Many new dinosaurs emerged—in great numbers. Among them were stegosaurs, brachiosaurs, allosaurs, and many others.
Four women at the Institute of Vertebrate Paleontology and Paleoanthropology in Beijing, China, underscore a 19-foot (5.7-meter), 200-million-year-old ichthyosaur fossil from southern China. Although its name is Greek for "fish lizard," Ichthyosaurus was no fish—it was a reptile that swam the Mesozoic oceans.
The late Jurassic Stegosaurus, like the pair walking through a North American forest in this illustration, was a slow-moving, plant-eating dinosaur that grew as long as 30 feet (9 meters) and as much as 2 tons. Its most impressive feature was a row of large plates and tail spines down the length of its back—some more than three feet (one meter) tall.
A herd of brachiosaurs congregates on a forested coast in this artist's depiction. At up to 92 feet (28 meters) and 50 tons, these sauropods (large, herbivorous dinosaurs) were much larger than any land animal alive today. Long, lean limbs, high shoulders, and a 30-foot-long (9-meter-long) neck allowed Brachiosaurus to graze from the treetops of North America and parts of Africa, where its fossils have been found.
Artwork by DEA Picture Library
An Allosaurus tramps through a Mesozoic-era forest in this artist's depiction. Allosaurus was the top predatory dinosaur of the late Jurassic period in North America. Not a particularly fast runner, it likely ambushed unsuspecting prey as it passed by.
The late-Jurassic Archaeopteryx lithographica, shown here with legs akimbo and wings outspread, is believed by many to be the world's first bird. Found in the Solnhofen Limestone Formation in Bavaria, Germany, Archaeopteryx lithographica possessed developed wings that probably allowed it to fly for short distances.
From : Nationalgeographic
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鳥是恐龍!恐龍是鳥 |
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