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 government of France has given thin excuses for its weapons tests; the greatest danger lies in the precedents these tests will provide for the other black sheep who may want to join the planned Comprehensive Test-Ban Treaty.
Analogy with natural evolution is the guiding principle of an essay in molecular dynamics that successfully predicts the structure of C60, or buckminsterfullerene.