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About Deinocheirus:
Deinocheirus is a case study in how much extrapolation paleontologists have to do based on limited evidence. All we know for sure about this dinosaur is based on a handful of fossil remains--specifically, two long forelimbs and bits of ribs and vertebrae--that were dug up in Southern Mongolia in 1970.
Still, that hasn't kept experts from speculating. It's surmised that Deinocheirus had a bipedal stance, and used its long, clawed arms to hunt down and eat smaller prey (although some paleontologists theorize that it may have used its long fingers to climb trees--and thus may have had a herbivorous diet, like modern sloths). The current consensus is that Deinocheirus was an ornithomimid ("bird mimic"), making it one of the few ornithomimids whose name doesn't end in "mimus".
