Navigation Links
Mammals Grew Big After Dinosaurs Died Off: Analysis
Date:11/25/2010

THURSDAY, Nov. 25 (HealthDay News) -- Mammals began to grow much larger after dinosaurs became extinct 65 million years ago, a new study suggests.

An international team of researchers analyzed the fossils of major groups of land mammals on each continent and found that their size increased from a maximum of about 10 kilograms (22 pounds) when they shared the Earth with dinosaurs to a maximum of 17 tonnes (18.7 U.S. tons) after dinosaurs became extinct.

"Basically, the dinosaurs disappear and all of sudden there is nobody else eating the vegetation. That's an open food source and mammals start going for it, and it's more efficient to be an herbivore when you're big," study co-author Jessica Theodor, an associate professor in the biological sciences department at the University of Calgary, said in a university news release.

The findings also show that the global ecosystem is able to reset itself relatively quickly.

"You lose dinosaurs 65 million years ago, and within 25 million years the system is reset to a new maximum for the animals that are there in terms of body size. That's actually a pretty short time frame, geologically speaking. That's really rapid evolution," Theodor said.

The study is published in the Nov. 25 issue of the journal Science.

More information

The Smithsonian Institution National Museum of Natural History explains how mammals evolved.

-- Robert Preidt

SOURCE: University of Calgary, news release, Nov. 25, 2010


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Page: 1

Related medicine news :

1. Kids ER Visits Down After Cold Medicine Withdrawal
2. Assessment tool predicts blood clot risk after plastic surgery
3. HIV Patients Do Well After Kidney Transplants: Study
4. Higher Plavix Dose Wont Boost Outcomes After Stent Placement: Study
5. Sponges, Surgical Tools Sometimes Left in Kids After Operation
6. Research uncovers extensive natural recovery after spinal cord injury
7. For Some, Care May Be Withdrawn Too Soon After Cardiac Arrest
8. Study suggests physicians wait longer for brain recovery after hypothermia Rx in cardiac arrest
9. Key player in detoxification pathway isolated after decades of searching
10. Louisiana State University Health Sciences Center research shows fish oil component given up to 5 hours after stroke limits brain damage
11. Cooling may benefit children after cardiac arrest
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Mammals Grew Big After Dinosaurs Died Off: Analysis
(Date:10/22/2014)... 2014 Richard Carlson, Managing Partner of ... with over 25 years experience. Mr. Carlson is ... areas related to EDI, B2B Commerce, RFID and Internet/Intranet ... Advisory Board member for Pharmaceutical Commerce Magazine and a ... Group is a management and technology consulting firm focused ...
(Date:10/22/2014)... Maureen Salamon HealthDay Reporter , ... in vitro fertilization (IVF) are only about half as likely ... reproduction technique, new research indicates, and the racial disparity persists ... about 31 percent of white patients became pregnant after IVF, ... more than 4,000 IVF cycles over two years to tease ...
(Date:10/22/2014)... Maureen Salamon HealthDay ... A crucial part of conventional in vitro fertilization (IVF) -- ... instead take place in a device inside the vagina, new ... contend that the device, called an INVOcell, might sharply cut ... also make the technology more accessible to those who don,t ...
(Date:10/22/2014)... Dennis Thompson HealthDay Reporter ... who was diagnosed with Ebola while working for NBC News ... can leave the special isolation unit at Nebraska Medical Center in ... the hospital said Tuesday. A blood test confirmed by the ... 33, can head home to Providence, R.I., NBC News ...
(Date:10/20/2014)... Allegheny General Hospital’s (AGH) Cardiovascular Institute ... to repair a damaged mitral valve as the heart ... developed by Abbott Vascular , is designed to ... condition in which the heart’s mitral valve leaflets fail ... the heart’s left ventricle into the left atrium. The ...
Breaking Medicine News(10 mins):Health News:Rich Carlson and Marc Duey to Hold Workshop at CBI’s Specialty Pharmacy and Distribution Networks Conference 2Health News:Black Women Fare Worse With Fertility Treatments, Study Says 2Health News:Black Women Fare Worse With Fertility Treatments, Study Says 3Health News:Experimental Infertility Treatment Seems Effective, Cheaper 2Health News:Experimental Infertility Treatment Seems Effective, Cheaper 3Health News:Experimental Infertility Treatment Seems Effective, Cheaper 4Health News:U.S. Cameraman Treated for Ebola 'Free' of the Virus 2Health News:U.S. Cameraman Treated for Ebola 'Free' of the Virus 3Health News:Allegheny General Hospital Introduces New, Beating-Heart Procedure for Mitral Valve Repair 2Health News:Allegheny General Hospital Introduces New, Beating-Heart Procedure for Mitral Valve Repair 3
... through an animal study that Aspartame can cause lymphoma, ... five 20-ounce bottles of diet soda sweetened with aspartame ... ,The study would be published in March issue ... journal., ,The method and sample adopted were feeding ...
... short breaks can go a long way in making ... study conducted by Massachusetts Institute researchers. // ... Massachusetts Institute of Technology in Cambridge, found that rats' ... pause briefly to rest., ,They suggest that eliminating ...
... cell research in the state with the approval of 61% ... have impeded the initiative. // ,The officials now ... will be initiated. Zach Hall, president of the California Institute ... would commence the project as soon as possible. ...
... Howard has allocated $1.1 billion in health reforms. But his ... ,Mr. Howard said that there was more mental illness previously ... thing is to move on with one’s life. ... ill-informed. ,Though he said that in reality mental ...
... Honolulu: The Hawaii State Hospital has gone down the ranks ... crowding, a status report has revealed//. The status report quotes, ... to meet the June 30th deadline, required to bring the ... had received a one-year extended timeframe till June 30 to ...
... the help of prisoners from Beur jail in Patna to ... near the jail and begged for money to fulfill the ... was kidnapped in Phulwarisharief while he was on his way ... to use their contacts outside the jail to help trace ...
Cached Medicine News:Health News:Task Learning Made Simple By Taking Short Breaks 2Health News:Momentum of Stem cell research impeded by legal challenges 2
(Date:10/22/2014)... 2014 Provectus Biopharmaceuticals, Inc. (NYSEMKT: PVCT) specializes ... investigational drug for cancer, is designed for injection into ... Its oncology focus is on melanoma, breast cancer and ... trials of PV-10 as a therapy for metastatic melanoma, ... dermatitis and psoriasis. This summer, the ...
(Date:10/22/2014)... SHANGHAI , Oct. 22, 2014 /PRNewswire/ ... FMI ) and WuXi PharmaTech (Cayman) Inc. (NYSE: ... Foundation Medicine,s comprehensive genomic profiling to biopharmaceutical companies conducting ... Under the terms of the collaboration, Foundation ... laboratory component of Foundation Medicine,s FoundationOne® assay at the ...
(Date:10/20/2014)... 2014  Luoxis Diagnostics, Inc., a subsidiary of ... that its academic collaborators will present several peer-reviewed ... its novel RedoxSYS Diagnostic System, a first-in-class platform ... in response to injury or illness.  A poster ... clinical marker will be presented by Christopher ...
Breaking Medicine Technology:Provectus Biopharmaceuticals Looks at the Asian Markets: Analyst Coverage by Small Cap Traders 2Foundation Medicine and WuXi PharmaTech Announce Strategic Collaboration to Offer Best-in-Class Comprehensive Genomic Profiling in China 2Foundation Medicine and WuXi PharmaTech Announce Strategic Collaboration to Offer Best-in-Class Comprehensive Genomic Profiling in China 3Foundation Medicine and WuXi PharmaTech Announce Strategic Collaboration to Offer Best-in-Class Comprehensive Genomic Profiling in China 4Foundation Medicine and WuXi PharmaTech Announce Strategic Collaboration to Offer Best-in-Class Comprehensive Genomic Profiling in China 5Luoxis to Highlight RedoxSYS at Two Upcoming Scientific Conferences 2Luoxis to Highlight RedoxSYS at Two Upcoming Scientific Conferences 3Luoxis to Highlight RedoxSYS at Two Upcoming Scientific Conferences 4Luoxis to Highlight RedoxSYS at Two Upcoming Scientific Conferences 5
... the risk of cardiovascular hospitalization or death by 24 ... Sanofi-aventis (Paris Bourse: EURONEXT: SAN; and ... that the ATHENA trial was published in the New ... (dronedarone), in addition to standard therapy, significantly reduced the ...
... a study published in The American Journal of ... Clinic psychiatrist Mark Frye, M.D., attempted to identify what ... to experience treatment-emergent mania (TEM).Bipolar disorder, also known as ... mood instability that can be serious and disabling. The ...
Cached Medicine Technology:New England Journal of Medicine Publishes Results From the Landmark ATHENA Trial with Multaq(R) (dronedarone) in Atrial Fibrillation 2New England Journal of Medicine Publishes Results From the Landmark ATHENA Trial with Multaq(R) (dronedarone) in Atrial Fibrillation 3New England Journal of Medicine Publishes Results From the Landmark ATHENA Trial with Multaq(R) (dronedarone) in Atrial Fibrillation 4New England Journal of Medicine Publishes Results From the Landmark ATHENA Trial with Multaq(R) (dronedarone) in Atrial Fibrillation 5New England Journal of Medicine Publishes Results From the Landmark ATHENA Trial with Multaq(R) (dronedarone) in Atrial Fibrillation 6Study Suggests New Treatment Approach May be Needed for Management of Depression in Some People With Bipolar Disorder 2Study Suggests New Treatment Approach May be Needed for Management of Depression in Some People With Bipolar Disorder 3
Multispot HIV-1/HIV-2 is a rapid indirect EIA using recombinant and peptide antigens for simultaneous detection and differentiation of anti-HIV-1 and anti-HIV-2 antibodies in human serum or plasma....
Bio-Rad's Genetic Systems™ HBsAg EIA 3.0 screening and confirmatory assays offer outstanding sensitivity and early detection of HBV infection, helping to meet your testing criteria....
The most compact revolutionary innovation in hematology. 3 Part DIFF + CRP measurement on whole blood....
... Evolis™ is a self contained microplate ... based EIA assays. The system is dedicated ... encountered in todays busy laboratory. The system ... of EIA assays that satisfy their microplate ...
Medicine Products: