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T-Rex was how big?


Science and the movies have blended almost seamlessly to give audiences a view of what the Tyrannosaurus rex looked like. But they all may have gotten it wrong, at least in size.

T-rex modeling

With modern computer modeling, research by scientists at The Royal Veterinary College in London, and The Field Museum of Natural History in Chicago shows that the T-rex may have been twice as fast and reached weighed up to 30 percent more than previously thought. Five actual T-rex skeletons were used as a starting point.

T-rex modeling, from the Royal Veterinary College

The skeletons were laser scanned to create 3-D models. Creating digital cross-sections, leaving spaces for vital organs and allowing for a margin of error, scientists were left with a range of sizes, versus one average size that most tyrannosaurs probably either exceeded or never reached.


The results are a fascinating glimpse of what these magnificent creatures really looked like. But let’s be glad that no one’s trying to clone them to take a first hand look, at least not yet.

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