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:10/29/2014)... as ,facultative, form part—together with other cells—of tissues and ... from the others. However, they have a very special ... cells again. This phenomenon is something that happens in ... tissue growth, thus allowing the regeneration of the organ ... the underlying mechanism that allows these cells to retain ...
    (Date:10/29/2014)... organisms in the living world compete with members ... in how much they invest into their competitive ... to get access to high-quality resources, while others ... of the lower-quality resources that are left over ... animal and human societies seems to fluctuate considerably ...
    (Date:10/29/2014)... of kidney cancer patients in Europe sheds light on ... an apparent link between exposure to aristolochic acid and ... research, by an international team led by scientists from ... Montreal, underscores the importance of investigating possible sources of ... of the Aristolochia genus, also has been suspected of ...
    Breaking Biology News(10 mins):A mechanism that allows a differentiated cell to reactivate as a stem cell revealed 2Evolution of competitiveness 2Evolution of competitiveness 3Study sheds light on genetic architecture of kidney cancer 2Study sheds light on genetic architecture of kidney cancer 3
    (Date:10/30/2014)... October 30, 2014 SoundConnect ... provider, offers Office 365 end users the key ... complete phone system by adding voice enablement and ... includes Lync Online, a communication tool that includes ... With hosted voice, O365 becomes a comprehensive unified ...
    (Date:10/30/2014)... (PRWEB) October 30, 2014 Whitehouse Laboratories ... its ICH Stability Testing and Package Test Capacity. Responding ... centers on a dramatic increase in environmental chamber storage ... stability, storage and aging samples to be securely held ... this major capital expenditure has already taken place with ...
    (Date:10/30/2014)... -- A new report, commissioned by BioCrossroads and conducted ... look at Indiana,s capital market ... different time frames: 1993 to 2002 and 2003 to ... for investment growth.  The Life Science Innovation Capital ... in innovation dollars as well as an increase in ...
    (Date:10/27/2014)... North Carolina (PRWEB) October 27, 2014 ... invited earlier this month to sit down with Bryan Hamilton, ... from RPG Solutions to discuss talent in the Research Triangle ... topics that were highlighted at the roundtable include ... the Triangle, the significance of work/life balance and the unique ...
    Breaking Biology Technology:SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 2SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 3Whitehouse Labs Announces Major Capital Investment in Stability and Storage Testing Capacity 2Whitehouse Labs Announces Major Capital Investment in Stability and Storage Testing Capacity 3New report shows Indiana's gains in life sciences innovation capital outpace the nation 2New report shows Indiana's gains in life sciences innovation capital outpace the nation 3New report shows Indiana's gains in life sciences innovation capital outpace the nation 4New report shows Indiana's gains in life sciences innovation capital outpace the nation 5Personify's Ryan Carfley Talks Recruiting with Triangle Business Journal, RPG Solutions 2Personify's Ryan Carfley Talks Recruiting with Triangle Business Journal, RPG Solutions 3
    Cached News: