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:3/23/2015)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... commerce market, announces its biometric payment technology, the Wocket® smart ... starting March 30 th . The ... New York markets. Gino ... our new ad campaign following the recent initial shipment of ...
    (Date:3/20/2015)... Mar. 19, 2015 Research and Markets ( ... Biometrics - Global Strategic Business Report" report to their ... Iris Biometrics in US$ Thousands. The report provides separate comprehensive ... Japan , Europe , ... and Latin America . Annual ...
    (Date:3/17/2015)... , March 17, 2015 Emotient, ... analytics software, today announced general availability of ... service for the analysis of facial expressions. The ... advertising, media content, products and services. It delivers ... engagement and sentiment - as derived from facial ...
    Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet to Launch New CNBC Regional TV Ad Campaign 2NXT-ID's Wocket Smart Wallet to Launch New CNBC Regional TV Ad Campaign 3Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 2Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 3Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 4Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 5New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 2New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 3New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 4
    (Date:4/1/2015)... , April 1, 2015  Organovo Holdings, ... company focused on delivering breakthrough 3D bioprinting technology, ... kidney tissue at the 2015 Experimental Biology conference ... "Kidney represents an ideal extension of ... can be tremendously useful in pharmaceutical research," said ...
    (Date:4/1/2015)... (PRWEB) April 01, 2015 Holomic is ... can read both chromatographic and fluorescent rapid tests with ... of high performance, quantitative readers and is already selling ... HRDR-400 is a first of its kind offering for ... instrument. , Dr. Neven Karlovac, CEO of Holomic ...
    (Date:4/1/2015)... (PRWEB) April 01, 2015 Earlier this ... a vibrant life sciences industry association that represents research-based ... members. , Jonathan Parker, AJO’s Vice President of ... Dinner in February, an event that attracted over 750 ... Don Wright, a 73 year old cancer survivor shared ...
    (Date:3/31/2015)... March 31, 2015  Biotest Pharmaceuticals Corporation (BPC), a ... announce the addition of its newest plasma collection center ... Conway, Arkansas . The over 16,000 square ... on March 26 th 2015 and brings the ... "This facility represents another milestone in ...
    Breaking Biology Technology:Organovo Describes First Fully Cellular 3D Bioprinted Kidney Tissue 2Organovo Describes First Fully Cellular 3D Bioprinted Kidney Tissue 3Organovo Describes First Fully Cellular 3D Bioprinted Kidney Tissue 4Holomic to Introduce the First Dual, Chromatographic and Fluorescent Rapid Test Reader, the HRDR-400 2HR Consulting Firm, A.J. O'Connor Associates Joins BioNJ – The Vibrant 400 Member Strong Life Sciences Industry Association - and Attends its Annual Dinner 2Biotest Pharmaceuticals Corporation Announces the Opening of its Newest Plasma Collection Facility in Conway, Arkansas 2
    Cached News: