There’s an ancient philosophical joke that’s much subtler than it seems. Question: Why is the Universe here? Answer: Where else would it be? - Arthur C. Clarke

So here, Floyd told himself, is the first generation of the Spaceborn; there would be more of them in the years to come. Though there was sadness in this thought, there was also a great hope. When Earth was tamed and tranquil, and perhaps a little tired, there would still be scope for those who loved freedom, for the tough pioneers, the restless adventurers. But their tools would not be ax and gun and canoe and wagon; they would be nuclear power plant and plasma drive and hydroponic farm. The time was fast approaching when Earth, like all mothers, must say farewell to her children.

But was even this the end? A few mystically inclined biologists went still further. They speculated, taking their cues from the beliefs of many religions, that mind would eventually free itself from matter. The robot body, like the flesh-and-blood one, would be no more than a stepping-stone to something which, long ago, men had called “spirit.” And if there was anything beyond that, its name could only be God.

He left the unspoken question hanging in the air. How did one annoy a two- kilometre-long black rectangular slab? And just what form would its disapproval take