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:2/5/2015)... 2015  Marken is starting its 35 th ... a new marketing campaign to solidify its place as ... campaign focuses on First as a primary ... The first headline in the series, ... its client,s priorities. Marken recognizes the need to protect ...
    (Date:2/5/2015)... 26, 2015 NXT-ID, Inc. (NASDAQ: NXTD ... authentication company focused on the growing mobile commerce market, ... http://www.nxt-id.com/ ) as part of its 2015 marketing and ... launched its new consumer website for Wocketwallet.com earlier this ... of NXT-ID said, "Our new corporate website naturally showcases ...
    (Date:2/5/2015)... -- New Market Research Reports Title Global ... 2020 has Been Added to GrandViewReseach.com Report Database ... reach USD 5.10 billion by 2020, according to a ... help identify the site of tissue damage in case ... in medical imaging applications. They have been extensively used ...
    Breaking Biology News(10 mins):Marken Launches New Patient-Centric Campaign 2NXT-ID, Inc. Launches New Corporate Website As Part Of Ongoing 2015 Branding Initiatives For Wocket Smart Wallet 2NXT-ID, Inc. Launches New Corporate Website As Part Of Ongoing 2015 Branding Initiatives For Wocket Smart Wallet 3IR Camera Market Worth $5.10 Billion By 2020: Grand View Research, Inc. 2IR Camera Market Worth $5.10 Billion By 2020: Grand View Research, Inc. 3
    (Date:2/27/2015)... Immunovaccine Inc. (“Immunovaccine” or the “Company”) ... press release disseminated this morning by PR Web, and ... press release states that Immunovaccine has entered into a ... release did not originate from Immunovaccine and there is ... release. Please note that all official statements by ...
    (Date:2/27/2015)...  Pharmacyclics, Inc. (NASDAQ: PCYC ) ... newly developed Bruton,s tyrosine kinase (BTK) inhibitor for ... results of these preclinical evaluations have been communicated ... feedback received from the Agency is supportive of ... preclinical work is required to begin a Phase ...
    (Date:2/27/2015)... 2015 Research and Markets ( http://www.researchandmarkets.com/research/p2ddnr/global_market ) ... of Trypsin" report to their offering. , ... providing comprehensive data on Trypsin globally and regionally ( ... North America , Latin America ... Trypsin This report focuses on three primary areas; ...
    (Date:2/27/2015)... Md. (PRWEB) February 27, 2015 ... Chromatography system (Nexera UC) can sequentially analyze up ... separation combined with high-sensitivity detection of targets by ... is designed to fulfill the measurement requirements of ... in food products, drug delivery and search for ...
    Breaking Biology Technology:Immunovaccine Disclaims Hoax Press Release 2Pharmacyclics Provides Clinical Update on BTK Inhibitor for Autoimmune Diseases 2Pharmacyclics Provides Clinical Update on BTK Inhibitor for Autoimmune Diseases 3Global Market Report of Trypsin 2014-2018 2Shimadzu Corporation Launches Nexera UC - The World’s Foremost Unified Chromatography System 2Shimadzu Corporation Launches Nexera UC - The World’s Foremost Unified Chromatography System 3
    Cached News: