8A
Friday, May 3, 1996
UNIVERSITY DAILY KANSAN
- Completely furnished
* Studio, 1 BR, 1 BR,
w/oft, 2 & 4 BR.
* On-site management
* On K.U. bus route
* Pool & Clubhouse
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7TH & FLORIDA 841-5255
managed by 842-4455
Soar this summer with Independent Study!
Rush over to the Independent Study office, north of the Kansas Union, and enroll before you leave the campus. Over 120 classes available including graduate. Call 864-4440 for information. How about...
ENGL 325c. Recent Popular Literature
APER 330c. Principles of Nutrition
MATH 365c. Elementary Statistics
WC 204c. Western Civilization I
WC 205c. Western Civilization II
Let a correspondence course help your on-campus course load.
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Beginning August 1, 1996
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1-888-MBA-1-SAU (Toll Free)
(319) 333-6270
mba@saunix.sau.edu
http://www.sau. edu/sau.html
518 West Locust St. • Davenport, Iowa 52803
Study contends dinosaurs weren't born defenseless
Researchers say adults still cared for their young
The Associated Press
WASHINGTON — Dinosaurs, history's terrible lizards, tenderly may have guarded their unhatched eggs, but a study contends that the newborn leaped from their shells ready to scamper into a dangerous world.
"They had the ability to hit the ground running," said Nicholas R. Geist, a researcher at Oregon State University. "They were highly mobile. They were able to run and protect themselves."
The comparative study shows that just-hatched dinosaurs were not defenseless dependents, like most birds, Geist said yesterday in an interview. Instead, the dinosaur babies had the bone and muscle strength to move rapidly and to scamper away from danger, just as modern crocodile young can.
Geist and Terry D. Jones, also of Oregon State, came to this conclusion by comparing the density of pelvic bones in fossilized dinosaur embryos with the bones of modern birds and crocodiles. A report on the study is scheduled to be published today in the journal Science.
Other experts strongly disagree.
Jack Horner, a Montana State University paleontologist who has found and studied fossils from unhatched dinosaurs, said the Oregon State findings have been misinterpreted.
He believes dinosaur adults were
"They had the ability to hit the ground running. They were highly mobile. They were able to run and
protect themselves."
Oregon State University researcher
Horner said that he thought dinosaur hatchlings were nest-bound because they were found in nests.
tender, nurturing parents and that the young remained in their natal nest for feeding and protection. The idea of nurturing dinosaurs is so strongly entrenched that one fossil discovery in Montana has been named malasaura, meaning "good mother lizard."
"It makes little sense that they would leave the nest after hatching and then return to it," he said.
The very size difference between hatchlings and their parents suggests that the newborns could not have lived alone in that dino-eat-dino world millions of years ago, said Homer.
The young would have been tender
morsels snapped up by any passing meat-eater $r$.
"I'm not saying the dinosaur parents left them unprotected," said Geist. Instead, he said, the infancy of the dinosaur was more like that of creatures such as ostriches, chickens, ducks and alligators. The young of all those animals hatch into the world able to walk or swim, but they still are cared for by their parents for some time.
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"It's not a question of parental care. Alligators make good parents and have been known to remain in family groups for two years," said Geist. "Dinosaurs could have been very good parents, but their young were not helpless."
Geist and Jones compared the leg and pelvic bones of a group of modern birds and alligators with those of fossils of dinosaur embryos found in Montana, Canada and Asia.
They found that the dinosaur pelvic bones more closely resembled modern animals whose young were hatched with the ability to walk, run and swim. These are called precocial animals.
Geist said Most birds are atroical, meaning that they usually are hatched nude, blind and helpless. Their bones are soft and lack the heavy structure called ossification that the researchers found in the dinosaur fossils.
"You see the same thing in alligators," said Geist. "There was no reason why these dinosaur babies could not have moved."
Science, which published the study, is the journal of the American Association for the Advancement of Science.
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"This is OK, except...
...if you had done it on a computer, it would be a lot better."
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