Navigation Links
New research shows dinosaurs may have been smaller than we thought
Date:6/25/2009

FAIRFAX, Va., June 24, 2009 For millions of years, dinosaurs have been considered the largest creatures ever to walk on land. While they still maintain this status, a new study suggests that some dinosaurs may actually have weighed as little as half as much as previously thought.

In the study, published this week in the Journal of Zoology, Geoffrey Birchard, associate professor of environmental science and policy at George Mason University, was part of a team which uncovered a problem with the statistical model used by some scientists in the dinosaur community to estimate the mass of dinosaurs.

"The original equation used by scientists produces fairly accurate results when determining the mass of smaller animals, but when used on larger animals our research shows that many errors have occurred," says Birchard. "The new equation shows that dinosaurs are much smaller than we thought, but there is no mistaking that they were indeed huge animals."

Developed in 1985, the results of the original equation have been used by scientists to estimate or evaluate a variety of parameters, including brain size and egg size. The problem occurs as a result of transforming the data, which changes the properties of the original data, and creates biases that can affect the predictive results obtained from the equation.

Birchard and his colleagues realized there was an error when they used the equation to determine the weight of living animals such as a hippopotamus and an elephant and discovered that the equation greatly overestimated the weight of these animals.

The researchers developed a new equation for calculating dinosaur mass based on bone dimensions. This equation doesn't require the transformation of data that the original equation uses.

"The best way to understand the new equation is to think about a building that is built on pillars," says Birchard. "The bigger the building, the larger the pillars must be to support the weight of the building. In the same way, the legs of an animal are the pillars supporting its body."

According to Birchard, this new research suggests that some dinosaurs were much more slender than had been thought. It also changes many of the factors scientists have already determined about dinosaurs such as the amount of muscle required to use their bodies and how much they ate and breathed.


'/>"/>

Contact: Catherine Ferraro
cferraro@gmu.edu
703-993-8813
George Mason University
Source:Eurekalert

Related biology news :

1. Research shows skeleton to be endocrine organ
2. Newly created cancer stem cells could aid breast cancer research
3. Dominant cholesterol-metabolism ideas challenged by new research
4. Researchers identify proteins involved in new neurodegenerative syndrome
5. Texas researchers and educators head for Antarctica
6. MGH researchers describe new way to identify, evolve novel enzymes
7. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
8. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
9. U of MN researchers discover noninvasive diagnostic tool for brain diseases
10. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
11. Story ideas from the Journal of Lipid Research
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2016)... WAKEFIELD, Massachusetts , March 23, 2016 ... kombiniert im Interesse erhöhter Sicherheit Gesichts- und ... Xura, Inc. (NASDAQ: MESG ... heute bekannt, dass das Unternehmen mit SpeechPro ... insbesondere aus der Finanzdienstleistungsbranche, wird die Möglichkeit ...
(Date:3/22/2016)... PROVO and SANDY, ... Screening Ontario (NSO), which operates the highest sample volume ... testing, and Tute Genomics and UNIConnect, leaders in clinical ... today announced the launch of a project to establish ... testing panel. NSO has been contracted ...
(Date:3/18/2016)... , March 18, 2016 ... Suppliers of Biometrics, ICT, Manned & Unmanned Vehicles, Physical infrastructure ... & security companies in the border security market and the ... and Europe has led visiongain ... companies improved success. --> defence & security ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... ... ... Lady had been battling arthritis since the age of two and at ... owner Hannah sought the help of Dr Jeff Christiansen of Superior Veterinary Surgical ... and help with the pain of Lady’s arthritis. Dr Christiansen suggested that in conjunction ...
(Date:5/24/2016)... ... May 24, 2016 , ... Last week, Callan Capital, an ... and entrepreneurs, held The Future of San Diego Life Science event at the Estancia ... science community attended the event with speakers Dr. Rich Heyman, former CEO of Aragon ...
(Date:5/23/2016)... Zimmer Biomet Holdings, Inc. (NYSE and SIX: ZBH), a global ... Directors has approved the payment of a quarterly cash dividend ... The cash dividend of $0.24 per share will be ... record as of the close of business on June 24, ... the Board of Directors and may be adjusted as business ...
(Date:5/23/2016)... ... May 23, 2016 , ... ... molecular nanotechnology, announced the winners for the 2015 Foresight Institute Feynman Prizes. ... given in two categories, one for experiment and the other for theory in ...
Breaking Biology Technology: