One of my favorite shows, and one that is actually good, is Future is Wild. Both are awesome, its about what life may be like after humans go extinct. It has 3 main periods featured in it: 5 million, where another ice age has occured, 100 million, where a green-house effect has created a hot and humid planet similar to the early permian or late carberniforous, and 200 million years, where it wouldn't be very hard to confuse 200 million year earth with an alien planet.
My favorite time period is 200 million years, because it is so alien, no mammals, no fish(the last of them live in the sky), no reptiles, and no birds. The primary reason is that almost all land life, excluding insects, worms, and arthropods, were wiped out by a mass extinction. I find the complete extinction of that much life kind of implausible, as reptiles and fish have survived everthing the last 450 million years(the date of the first known mass extinction) has thrown at it. Of course, with a mass extinction, brand new life-forms can appear.
Cephalopods are the primary land animals, and instead of fish, crustaceans called Silver Swimmers replace fish. Of course, there's one thing that you will recognize, Sharkopaths, descendants of modern sharks that hunt in packs, and rule the seas.
The Cartoon is more enjoyable for kids, but is still good. The reason is good voice acting and actual differences in characer. Its actually funny how alot of animals are oddities in their community, yet turn out to be right in the end. Those of you who want more info on the cartoon look
here.It's quite enjoyable, and it got good ratings, I am surprised they didn't go further with it.