Sure, you can take some critical potshots. We'll get to that. But first credit Jurassic Park for being colossal entertainment -- the eye-popping, mind-bending, kick-out-the-jams thrill ride of summer and probably the year. After wimping out with Hook, director Steven Spielberg shoots the works and turns popular science into epic adventure.

Michael Crichton's speculative 1990 bestseller gives Spielberg a juicy two-pronged premise: What if dinosaur DNA extracted from mosquitoes trapped in amber…