[r9etb]

T-rex's legs bones aren't proportioned like a sprinter's bones. T-rex's femur accounts for about half of the length of its leg...

They're in roughly the same proportion as an ostrich, however, and ostriches are quite swift. It's worth noting the other similarities in skeletal structure, too.

[presidio9]

They're in roughly the same proportion as an ostrich, however, and ostriches are quite swift. It's worth noting the other similarities in skeletal structure, too.

FWIW, I think T-Rex was a predator, but the ostrich's femur is clearly a very small of the leg, especially compared to T-Rex.