“Even with the advantage of clothing, shelter, and boundless ingenuity, humans can manage to live on only about 12 percent of Earth’s land area and just 4 percent of the total surface area if you include the seas. It is a sobering thought that 96 percent of our planet is off-limits to us. Bryson, Bill. The Body (p. 194). Knopf Doubleday Publishing Group. Kindle Edition. Bryson, Bill. The Body (p. 194). Knopf Doubleday Publishing Group. Kindle Edition. ”