I agree with hex on playing clean first!!! That after all my friends is where all the fun is at. But........
Atfter loosing 6 tribes (Because of forgetting to pause my game and not going back to it enough), I have found something. I just did this to catch back up to where I was. If you find the stew recipe that restores health, you can figure out a way to get around the no food to time travel problem. I am not recommending this to everyone, just people like me that made a dumb mistake too many times! See if you can figure this out if you are getting mad enough at the game to give it up. It is worth trying before you give up on the game forever!