By the end of the century, Michio Kaku sees a world in which humans will have x-ray vision, and micromachines — smaller than the period at the end of this sentence — will perform surgery. “Your computerized toilet will be able to analyze proteins emitted from a colony of cancer cells from excretions,” says Kaku, co-founder of string field theory and professor of physics at City College. Kaku’s latest book, “Physics of the Future: How Science Will Shape Human Destiny and Our Daily Lives by the Year 2100,” predicts a future in which nearly everything we touch, including our eyeglasses, will be connected to the Internet. “You’ll blink and you’ll go online — it’s coming faster than you think.”

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