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Dinosaurs are different from crocodiles and other lizards, as well as birds, of course. The closest living relatives to dinosaurs are generally considered to be birds, as Charlatan alludes to. The caeleocanth is a fish, of course, not a dinosaur. It's a great example of a species that hasn't undergone significant change for quite awhile...it has apparently found a nice, stable niche in which to exist, with little selection pressure to adapt.
It's possible that there are other creatures that have remained relatively unchanged in a similar manner. Probably found in the oceans, since there are very, very, few areas on land that haven't been explored at least a little bit. But it's important to remember that these creatures have just as much evolutionary 'advancement' behind them as any other creature alive today...it's just that some species have adapted faster than others due to differences in selection pressure.
Another bit of evolution trivia - people did not 'evolve from monkeys', at least in the sense of the modern species of monkeys alive today. Evolution says that monkeys and people have a (relatively recent) common ancestor. A bit further back, and we share a common ancestor with pigs. And crocodiles, and celeocanths, and (probably) blue-green algae.
As a corollary, humans aren't any more 'advanced' than a bacteria, in evolutionary terms. Both us and a given species of bacteria have had the exact same amount of 'evolution' to get where we are today. We've just adapted to different niches.
And, in the long term, I personally have a theory that what we've done recently is turned evolution upside down...one of the most important traits that was selected *for* in humans (intelligence) is now somewhat correlated with having *fewer* children. So the fact that, at least today in america, relatively stupid people seem to tend to have more children that the more intelligent ones may actually serve as a 'cap' on human intelligence. Of course, this assumes a lot of things - that intelligence is highly tied to genetics, and that the current trend will continue for an evolutionary significant length of time.
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