What feature of the recovered limb bones is direct evidence of the immense compressive forces *Dreadnoughtus* legs had to withstand?

Answer

Their thickness and density

The thickness and density of the recovered humerus and femur are direct evidence indicating the scale of the compressive forces that these legs were adapted to manage with every step.

What feature of the recovered limb bones is direct evidence of the immense compressive forces *Dreadnoughtus* legs had to withstand?
fossilanatomydinosaursauropodtitanosaur