I learned as a kid that homo sapiens would rather fight other homo sapiens than microbes. For one thing, it’s easier. And there’s something satisfying about knowing somebody else is the bad guy and seeing them laid out on the street in front of you. Something human.Microbes? The little bastards just go hide, multiply, and come back to bite you when you least expect it.

Since he'd stepped out of medical school, all he'd ever done was fulfil the same three basic templates, again and again and again. The possibility of infinite variation had led only to convergence.

When we decided to have Julie, I couldn’t carry her. We sat down and the hard numbers stared back at us. I made twice as much as Fern. We wouldn’t have been able to feed ourselves, let alone another mouth, if I’d been the one to hold her. And so we both went for the operation, and they took eggs from the two of us and made them one. And then I squeezed Fern’s hand when she went into the theatre, and when she came out again they’d put it inside her. And sheltered by her body, the one cell that was us divided and became two, and then three, and then four hundred million, and then they divided into parts. Lungs, heart, brain, mouth. And finally, when she was ready, Julie divided from Fern and there were three of us.