Dinosaurs did not become extinct they evolved?
woolly mammoths look like elephants
sabre tooth tigers look like tigers now
elks are moose
and there's probably more
http://www.biology.iastate.edu/Cours...letons/ratskel
http://upload.wikimedia.org/wikipedi...Marasuchus.JPG
if you arch the back and reposition the legs on the second skeleton it would look pretty much like the first skeleton.
the first is a rat
and the second is a dinosaur called Marasuchus lilloensis
it has four legs so i reckon it would have ran around on all four legs instead of two hind legs as pictured.