h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

I had this idea last night when I was in bed. What if the universe, which we believe to be a vast and infinite place that is the only place in existence with nothing outside it, is merely a complex component or an organism in a small splotch of mold or fungus that is growing on the surface of a piece of cheese or fruit that has been pushed back and lost in the back of a refrigerator in an even more unimaginably vast universe? And what is to us millions of billions of years that took us to come into existence is nothing but a couple weeks or so in this other world in which we are only a yucky spot on an old pear or something? Kind of makes you feel small and pointless, doesn't it?

That reminds me of that one Madeline L'Engle book where they turn into mitochondria.

Oh yeah! That's the one that's the sequel to A Wrinkle in Time. A Wind in the Door or something.