A sophisticated survey of certain volatile organic compounds in the air over forest ecosystems shows how such work can reveal varied emission patterns of different chiral, or mirror-image, forms of these compounds.

Proteins aren't just defined by their constituent amino acids — structural modifications can yield complex mixtures of protein forms. An approach that controls the addition of such modifications may help to define their role.

A long-standing mathematical model for the growth of grains in two dimensions has been generalized to three and higher dimensions. This will aid our practical understanding of certain crucial properties of materials.