Over the course of this cycle of relapse and remission, Dr. Siegel will draw from the full arsenal of available treatments, eventually including the two newly approved therapies.

WSJ: New Drugs Slow a Fast-Spreading Cancer

Dr Bassetti said he could not draw any conclusions from the research on whether sleepwalking was due to faults in the immune system.

BBC: Sleepwalking is 'in the genes'

Dr Eastlund has also been able to draw on subsequent research on turning solids into plasmas. (This method is, in fact, used to apply coatings to the insides of tokamaks.) And the advent of supercomputers able to simulate tokamaks should also speed up the process of building a working prototype.

ECONOMIST: Nuclear waste