Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
The prospects of some success for the weary arms controllers at Geneva are brighter than for many years. The most obvious dangers are that there is almost too much choice.
A professor of biophysics and medical physics at the University of California, Berkeley, reflects on the arguments that have halted the ice-minus tests.
