A long, long time ago–say, 1990 or so–when I was still at the Saskatchewan Science Centre, the hot technology promising us a near-magical future of levitating trains, cheap power and ultrafast computers was room-temperature superconductors. It’s been a long time coming–a lot longer than some people predicted–but it may be in sight at last.
A better way to focus
I am informed by my optometrist I am beginning to suffer from presbyopia. Presbyopia is an affliction that is not, despite, its name, limited to members of a particular Christian denomination with Calvinist roots. Rather, it’s the loss of ability to focus on very close objects. It’s caused by the stiffening of the eye’s internal …

