File:Tyrannosaurus Rey.jpg

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T. rex trotting along beside a T. rex-sized chicken.

Calculations of the muscle mass required to power a fast-running T. rex showed that this was impossible—a 6-tonne chicken would have needed leg muscles making up almost 100% of its body mass. Realistically, T. rex had the muscles to run at about 5 meters per second (18 km/h, 11 mph) [26].
Date
Source Benton MJ (2010) Studying Function and Behavior in the Fossil Record. PLoS Biol 8(3): e1000321. doi:10.1371/journal.pbio.1000321
Author Painting courtesy of Luis Rey.
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This file was published in a Public Library of Science journal. Their website states that the content of all PLOS journals is published under the Creative Commons Attribution 4.0 license (or its previous version depending on the publication date), unless indicated otherwise.

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Date/TimeThumbnailDimensionsUserComment
current13:30, 8 August 2013Thumbnail for version as of 13:30, 8 August 20132,055 × 2,330 (2.34 MB)wikimediacommons>Cropbotupload cropped version, operated by User:FunkMonk. Summary: cropped

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