Science, 27 June 2014;344 (table of contents)

"Zero knowledge" tests could let inspectors identify a nuclear weapon without learning the secrets of its design.

Free Willy? Dolphin drama riles acquaria

Ecology:  Daring to live on the edge. Tracking the house sparrow's spread in Africa yields secrets of these invaders.

Language and Wallace's problem - review of More Than Nature Needs: Language, Mind, and Evolution, by Derek Bickerton

Letter: Carbon markets

Letter: A carbon code of conduct for science

Special Section:  The gas surge - Fracking

Foundations of human reasoning in the prefrontal cortex, Mael Donoso et al.

Clustering by fast search and find of density peaks, Alex Rodriguez and Alessandro Laio