Within a century, says quantum physicist Kaku, "our destiny is to become like the gods we once worshipped and feared". When he was a schoolboy, he built a particle accelerator in his mum's garage, and his writing is filled with an infectious, childlike wonder at the many ways in which science may transform life in the future. Based on interviews with 300 scientists, his book covers everything from AI and nanotechnology to the dawning of a planetary civilisation. He predicts we will solve our energy problems with fusion in the next half century, be able to control objects with our minds, and grow replacement organs in tissue factories: a person of 70 could have the organs of a 30-year-old. On the downside there will be no magic bullet for cancer and we will not be able to cure the common cold. The Wellsian idea that we're all going to become Men and Women Like Gods is quaintly old-fashioned. But despite the relentless technological optimism, Kaku does conjure up a genuinely exciting panorama of revolutionary science and magical technology.