Number6.2's Journal: Pre Cambrian Explosion

Is this evidence that we have been visited by a Von Neuman Probe?

Think about it. Up until then, Life is just plodding along. Then, all of a sudden, "poof". Even using The Razor (thanks, Occam), which is less believable: that there was a sudden burst of diversity (that, to my knowledge, has never been seen again), or that Earth was seeded by a VN probe. Damn thing is probably still hanging around, waking up every 165 million years or so. Wait, isn't that the pattern of mass extentions for the last billion years or so?!?

Just a thought...