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Re: *Giganotosaurus* running 50 km/h

14 m/s are 50.4 km/h. :-o This implies tyrannosaurs, with more cursorial
limb proportions, should have been even faster.


Thank you! Someone should send this to Jack Horner...

Somehow related comment: I am reminded of "When Dinosaurs Roamed America", during the final segment. Horner comes on and says that the femur/tibia ratios of *Tyrannosaurus rex* are not a proper ratio; i.e., femur longer than tibia; for fast running [I wonder if the "new" dynamic mounts at Carnegie were informed since they clearly show just the opposite]. A couple minutes later, Phil Currie shows up and says the truth, which is a far cry from Horner's claim.

This may be reduntant but I remember that in Horner & Lessem, '93 [The Complete T. rex], that Horner claimed that Sue was doomed to die because of her broken leg. He also mentioned that her leg wound was that of a fractured fibula. The fibula does not "directly" support weight. Especially in coelurosaurs, which show an increasing reduction of the fibula, with the most extreme example being advanced birds where the fibula is no longer connected to the mesotarsal joint. Besides *if* tyrannosaurs were social animals, which I understand is the current thought [as if the current thought mattered to me anyway :-)], the mate and the subadult were probably feeding her.

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<DIV><FONT face="Times New Roman, Times, Serif"><STRONG>Nicholas Gardner</STRONG></FONT></DIV>
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