University Of Alaska Anchorage

November 9, 2009 by Trend PK  
Filed under World News

University Of Alaska Anchorage: I grew up in Alaska. I didn’t know there were dinosaurs up here, and I admit my perception of dinosaurs has been largely formed by the movies.

University Of Alaska Anchorage:I grew up in Alaska. I didn’t know there were dinosaurs up here, and I admit my perception of dinosaurs has been largely formed by the movies. That changed at this weekend’s Rock and Mineral Show, which ended Sunday night.

We’ve seen the skeletons, looked at the big teeth, and watched the movies with giant lizards roaming tropical lands, so you might not expect to find dinosaurs in Alaska. And for many years scientists agreed: it was too cold.

In 1961 a dinosaur bone was found near the Colville River on the North Slope. It was thought to be a mammoth bone, and it wasn’t until the mid-1980s that they figured out what they had. Since then, thousands of dinosaur bones have been discovered.

“And what’s so exciting about Alaska is we have more dinosaurs, high-latitude dinosaurs in our state than all the other high-latitude localities combined,” said University of Alaska Anchorage geologist Anna Pasch.

During the Cretaceous period, average temperatures in Alaska ranged between 30 and 60 degrees — warmer than today, but by no means tropical. Finding dinosaurs in Alaska helped create a revolution of sorts in the way paleontologists thought about dinosaurs.

“These were very, very hotly debated questions in the sixties, whether they were hot or cold blooded,” Pasch said. “And now there is no question that dinosaurs were very active, and they had to have mechanisms to survive in colder environments.”

Since that first discovery, a dozen different types of dinosaurs have been found in Alaska, including the tooth of a T-rex. Though the names are familiar, polar dinosaurs were a little different from those who roamed the tropics. Their eyes were bigger to accommodate the lack of light and there’s evidence that they hibernated.

more info:http://www.ktuu.com/Global/story.asp?S=11467127

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