Paleontologists discover 120-million-year-old "Ghost Dragon" in China

Which of the following hypothetical scenarios do you think would be more terrifying: a modern-day world inhabited by Pterosauria (famous for being the first known vertebrates to evolve the capability of flight), or a modern-day world inhabited by Dromaeosauridae (famous for their sickle-like killing claws, among other… » 2/29/12 3:30pm 2/29/12 3:30pm