Alternate history can often act like a soothing balm: science fiction, but of a very special type. It’s the ultimate “what-if” version of science fiction, the impossible attempt to create counterfactual stories. It is the logical conclusion to the lying that is the art of storytelling; taken to extremes, any story is alternate history. But with Other Earths, we’re on more conventional ground when it comes to alternate history. It’s exactly what it says…