Things We’ll Probably Never See

New York Times: Not long ago in this space, I spoke with Michio Kaku, the author of “Physics of the Impossible” and a professor of theoretical physics at the Graduate Center of the City University of New York, about science-fiction-inspired technological breakthroughs that might actually occur within our own lifetimes. This week, Kaku talks about three long dreamt-of technologies that he categorizes as class I, class II and class III impossibilities — in other words, things you’ll simply never see during your time on earth. (Unless, like me, you plan to live forever.)