Featured Research

from universities, journals, and other organizations

Rare Fossil Shows Theropod Dinosaurs Are Fast, Dangerous 'Turbocharged' Reptiles

Date:
January 22, 1999
Source:
National Science Foundation
Summary:
Oregon State University (OSU) scientists funded by the National Science Foundation (NSF) have completed a study of what they say is the world's most perfectly preserved fossil of a theropod, or meat-eating dinosaur. They believe it provides an unprecedented view of the biology of these ancient reptiles.

Oregon State University (OSU) scientists funded by the National Science Foundation (NSF) have completed a study of what they say is the world's most perfectly preserved fossil of a theropod, or meat-eating dinosaur. They believe it provides an unprecedented view of the biology of these ancient reptiles.

The bottom line? You wouldn't want to meet a theropod in a dark alley. The research, to be published in this week's issue of the journal Science, offers insights into dinosaur metabolism, the warm-blooded versus cold-blooded debate, the question of whether or not dinosaurs might have been the ancestors of birds, and the biology that helped them dominate the world -- and eventually may have led to their extinction.

"This exquisitely preserved fossil shows that theropod dinosaurs had the ventilatory machinery to support periods of high activity, but that they lacked bird-style lungs or other anatomical features suggestive of a sustained high metabolic rate," according to Zoe Eppley, program director in NSF's division of integrative biology and neuroscience, which funded the research. "This find adds further support to the view that these dinosaurs were not warm-blooded."

This fossil is helping confirm that "the dinosaurs were indeed, by definition, cold-blooded, and that in all likelihood, birds are not the descendants of any known group of dinosaurs," said Nicholas Geist, a paleobiologist at OSU. "The extraordinary condition of this fossil allows us to 'hang some meat on the bones' of these animals and bring them back to life a bit. It's almost like a dinosaur dissection."

What that analysis reveals, Geist said, is an animal that had the best of both worlds. Like other cold-blooded animals, theropod dinosaurs had low metabolic rates while at rest, an excellent strategy for conserving energy. But their enhanced lung ventilation capacity gave them the potential for the aggressive, extended activity typical of birds and mammals. "Theropod dinosaurs were fast, dangerous animals," Geist said, "certainly not slow or sluggish. They could conserve energy much of the time and then go like hell whenever they wanted to. That might go a long way towards explaining why they were able to dominate mammals for 150 million years."

Geist and OSU colleague Terry Jones made these observations after study in Salerno, Italy, of a fossil first discovered just a few years ago of a baby Scipionyx, a meat-eater that lived about 110 million years ago and bore some similarity to a velociraptor. "Besides an intact skeleton, this fossil shows remnants of liver, large intestine, windpipe and even muscles," Jones said. "The baby dinosaur probably died in a shallow, still, saltwater marsh that preserved its structure incredibly well. It's like a Rosetta stone for paleontology, and shows us more about dinosaur biology than we ever knew before."

This type of physiology would provide some metabolic advantages unlike that of any animal still alive today, Jones said. "But for various reasons it only works well in a warm climate, which most of the world had during the age of dinosaurs. When the climate turned colder or more seasonal variation developed, what had once been the advantage of the dinosaurs became their problem."

Adds Geist, "A lot of people who only see cold-blooded reptiles moving slowly in temperate zones have no concept of what they can do in warmer climates and how well they can function. Then if you add in the lung capacity that we're finding for meat-eating dinosaurs, what you have is a turbocharged reptile. If you could go back in time and see one, that's probably the last thing you'd ever see."

Editors: Two color photographs in digital format of the Scipionyx fossil can be obtained by contacting Ute Vergin at 541-737-0785, or downloading directly from the Web at: http://www.osu.orst.edu/dept/ncs/photos/index.html


Story Source:

The above story is based on materials provided by National Science Foundation. Note: Materials may be edited for content and length.


Cite This Page:

National Science Foundation. "Rare Fossil Shows Theropod Dinosaurs Are Fast, Dangerous 'Turbocharged' Reptiles." ScienceDaily. ScienceDaily, 22 January 1999. <www.sciencedaily.com/releases/1999/01/990122073705.htm>.
National Science Foundation. (1999, January 22). Rare Fossil Shows Theropod Dinosaurs Are Fast, Dangerous 'Turbocharged' Reptiles. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/1999/01/990122073705.htm
National Science Foundation. "Rare Fossil Shows Theropod Dinosaurs Are Fast, Dangerous 'Turbocharged' Reptiles." ScienceDaily. www.sciencedaily.com/releases/1999/01/990122073705.htm (accessed July 30, 2014).

Share This




More Fossils & Ruins News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Rodents Rampant in Gardens Around Louvre

Rodents Rampant in Gardens Around Louvre

AP (July 29, 2014) Food scraps and other items left on the grounds by picnickers brings unwelcome visitors to the grounds of the world famous and popular Louvre Museum in Paris. (July 29) Video provided by AP
Powered by NewsLook.com
London's Famed 'Gherkin' Goes on Sale for 650 Mln

London's Famed 'Gherkin' Goes on Sale for 650 Mln

AFP (July 29, 2014) London's "Gherkin" office tower, one of the landmarks on the British capital's skyline, went on sale for about 650 million ($1.1 billion, 820 million euros) on Tuesday after being placed into receivership. Duration: 00:36 Video provided by AFP
Powered by NewsLook.com
Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Newsy (July 28, 2014) The asteroid that killed the dinosaurs struck at the worst time for them. A new study says that if it hit earlier or later, they might've survived. Video provided by Newsy
Powered by NewsLook.com
Tourists Disappointed to Find Rome Attractions Under Restoration

Tourists Disappointed to Find Rome Attractions Under Restoration

AFP (July 26, 2014) Tourists visiting Italy at the peak of the summer season are disappointed to find some of Rome's most famous attractions being restored and offering limited access. Duration: 01:01 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins