HOME >> BIOLOGY >> NEWS
T. rex owes its giant size to the ultimate teenage growth spurt

  • Field Museum scientist and colleagues chart first T. rex life history
  • Press conference Aug. 11 at noon to announce findings

    CHICAGO--For the first time, scientists have determined the lifelong growth pattern for the Tyrannosaurus rex. T. rex reached its massive adult size due to an extraordinary growth spurt that stretched from about 14 to 18 years of age. Furthermore, the surge was followed by about 10 years of little or no growth as an adult, according to a study that will be the cover story of Nature Thursday, Aug. 12, 2004.

    During the peak in its growth spurt, T. rex gained 2.1 kilograms (4.6 pounds) per day, developing into a more than 5,000-kilogram (11,000-pound) giant, one of the largest terrestrial carnivorous animals ever.

    "Knowing the lifeline is important because we now understand the evolution of T. rex's giantism, one of the most fascinating aspects of dinosaurs," said Peter Makovicky, PhD, Dinosaur Curator at The Field Museum and a coauthor of the study. "With the life history parameters, we can better understand T. rex evolution, biology, biomechanics and population dynamics."

    Makovicky and his colleagues determined T. rex's growth pattern and lifespan using an innovative technique that could be applied to many other dinosaurs. They determined the age by counting growth lines in T. rex bones and calculated the corresponding body size from circumference measurements of the femur. Correlating these two sets of data results in a growth curve.

    It has long been known that large weight-bearing dinosaur bones display growth lines, but they are hard to read. This is due to the way these large bones form: their marrow cavity expands and changes shape as they grow, erasing some of the internal lines.

    This study, however, focuses on smaller, nonweight-bearing dinosaur bones, including ribs, gastralia, and fibulas. These bones do not develop hollow cavities or remodel as they grow, so growth lines
    '"/>



  • Contact: Greg Borzo
    gborzo@fieldmuseum.org
    312-665-7106
    Field Museum
    11-Aug-2004


    Page: 1 2 3

    Related biology news :

    1. Growing pains: T. Rex was teenage giant
    2. Envisat fishes up facts behind Chilean giant squid invasion
    3. First view of giant crabs - at home on the slope
    4. Diet study focus of TAES research in effort to help save giant panda
    5. Best chance to protect giant pandas
    6. Dispatches and images available: Human impact on giant panda habitat
    7. University of Ulster spearheads giant leap forward in medicine
    8. Tropical glaciers formed while earth was giant snowball
    9. Discovery of tidal giant--a new Egyptian dinosaur--reported in Science
    10. Saving Floridas gentle giants
    11. Taking the pulse of giants: Detecting change and its consequences in western mountain ecosystems

    Post Your Comments:
    *Name:
    *Comment:
    *Email:
    TAG: rex owes its giant size the ultimate teenage growth spurt

    (Date:12/19/2014)... , Dec. 18, 2014 Research and ... the addition of the "iPhone 5S Fingerprint ... Report" report to their offering. ... the acquisition of AuthenTec in July 2012, Apple ... 5S. It is currently the only device of ...
    (Date:12/19/2014)... Dec. 18, 2014   LaunchKey , the first ... post-password and Internet of Things era, today announced the ... venture round was led by Metamorphic Ventures with participation ... Partners, VegasTechFund, and others.  LaunchKey has raised $4 million ... expand its team and bring LaunchKey to market in ...
    (Date:12/17/2014)... 15, 2014  HITLAB SM announced today ... audit to confirm its adherence to current U.S. ... enables HITLAB to conduct regulated smart device and ... for patient safety and research quality. ... quality, and delivery with innovative technology," said ...
    Breaking Biology News(10 mins):iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2
    (Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one of the nation’s ... Pharm.D. to the newly created position of Vice President ... Dr. Maroulis will continue to manage the entire specialty ... pharmacies as the company expands. Dr. Maroulis has been ... has served in many different capacities in the pharmacy, ...
    (Date:12/19/2014)... CITY, Calif. , Dec. 19, 2014 Bina ... , USA) announced today that they have been acquired ... 1,2 is a privately held company that provides ... of next generation sequencing (NGS) data for the academic ... the Roche Sequencing Unit, and will continue to focus ...
    (Date:12/19/2014)... Springs, FL (PRWEB) December 18, 2014 ... of the nation’s leading specialty pharmacies, has an ... serve as clinical pharmacy consultants for prescriber offices ... therapy expertise. , “We have a variety ... therapies. For example, those specializing in hepatitis C ...
    (Date:12/19/2014)... December 18, 2014 Ed Bilsky, Ph.D., ... the Center for Excellence in the Neurosciences (CEN), and ... has been selected as a member of the prestigious ... first neuroscientist from Maine to receive this honor. , ... supported entirely by the Dana Foundation. Its mission ...
    Breaking Biology Technology:BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3BioPlus Specialty Pharmacy Expands ‘Regional Pharmaceutical Care Liaison’ Team 2BioPlus Specialty Pharmacy Expands ‘Regional Pharmaceutical Care Liaison’ Team 3UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 2UNE's Ed Bilsky Named Member of Dana Alliance for Brain Initiatives 3
    Cached News: