Humans have long augmented our bodies with eyeglasses, clothing and prosthetics. Thanks to recent scientific advancements, we are now on the cusp of a second wave of body-modification. Nanotechnology may give us contact lens cameras and robots small enough to patrol our bloodstreams. Genetic modification could tweak us to be smarter, smaller and more eco-friendly, while neural interfaces might allow us to plug our brains directly into the web. Nature made us. Next Nature made us better.