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.
Last week's hoop-la notwithstanding, the most urgent need in respect of global warming is to negotiate an international convention on greenhouse gases. Nature will play its part with regular summaries of relevant research.
Pulsed-field electrophoresis, the newest version of a standard technique, has become widely used for the sieving of large DNA molecules long in advance of an understanding of exactly how it yields useful results.