Read Jeff Carlson's blogs and other content on the Penguin Community. View our feature on Jeff Carlson's "Plague Year."The nanotechnology was designed to fight cancer. Instead, it evolved into the Machine Plague, killing nearly five billion people and changing life on Earth forever. The nanotech has one weakness: it self-destructs at altitudes above ten thousand feet. Those few who've managed to escape the plague struggle to stay alive on the highest...