Seeking to differentiate itself, Discovery has upped its ambitions in recent years with documentaries like "Life" and "Planet Earth." Even if Dinosaur Revolution doesn't quite rise to that level, it's a creditable stab at offering viewers a taste of life on a prehistoric planet.

[It] isn't quite as revolutionary as it suggests, but it's a lively account of some big guys who, if it weren't for a single stray asteroid, might still be here today.

Not the greatest dinosaur, er Discovery, but it's a respite from the endless 9/11 coverage that will dominate next week's fare.

When one cuts through its mix of slight pleasures and leaden annoyances, it's apparent that Dinosaur Revolution is not revolutionary in form or content, and moreover, that its melding of entertainment with science ends up disfiguring both.