“No, this cave has been here a lot longer than the seed vault. It was used by the nineteenth-century sealers. A storage room for their catches.” Meaning once upon a time it was filled with the dead. I can see them laid out before me, all those creatures we passed outside, hundreds of them now lifeless, and it isn’t the first time I have resented the vividness of my imagination. I don’t like this room. I don’t like being down here.