What if the West Antacrtic Ice Sheet melts? Where will we live if there are ever more human beings for ever less land? Here's a dramatic and at times light-hearted exploration of some solutions that are being proposed — or even being implemented. Under the earth or atop the sea — will we be able to live well there if need to arises? Might we choose to live there anyway for advantages that homes in such places may offer us? The treatment of these topics may be light hearted, but the subjects that it addresses aren't. The farther ahead we plan, the better off we're likely to be.