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T. rex foot
Compare the foot of this big land vertebrate with the hand of a human... Pretty massive animal, right? Can you guess the species? Well, a T. rex dinosaur, of course! This specimen welcomes you in the foyer of the Denver Museum of Nature and Science, CO, US.
Saurischia
Dinosaurs can be classified into two groups, based on the arrangement of their hip bones. One group is named Saurischia, and the pubic bone points forward, in the opposite direction of the ischium, which points backward. All carnivore (and some herbivore) dinosaurs were saurischian. The example in this photo shows the saurischian configuration of the pelvis (articulated with leg bones + vertebral column) of an Allosaurus skeleton, on display at the Denver Museum of Nature and Science.