Life after people

I just saw a commercial for a TV movie from the History Channel called Life After People. The basic idea: humanity suddenly no longer exists and what happens next. Ought to be interesting, I hope to record it. I've actually wondered in the past what happens at the End Of Time. One thought: let's say either a meteor hits the earth in a global-life-ending catastrophe, or say a rapture or something similar. Either way, everyone dies/leaves earth/etc. What about kids - they don't get to grow up to be adults. Babies and toddlers never learn to walk or talk. If it's a rapture-like event, what about those cars no unpopulated (or partially populated - what if the driver goes and not you)? What if enough people leave or die, how do those left gather together, or does humanity fall apart? If it's a epidemic, what if it happens slowly, say over a year or two? Some people may think they're prepared in case it's sudden, but if it's delayed it would have a different effect on society and people.