Instrumentation: Business picks up as worry over economy begins to dissipate.

Theoretical calculations of the mechanism of the Cope rearrangement of metalla-1,5-hexadienes pave the way for the actual experiments.

The authors review their 20 years of research into crystals illuminated with polarized light.

Forests are being damaged by acid rain, possibly the result of a breakdown of chemicals introduced to help protect Earth’s ozone layer.

Single-walled carbon nanotubes were tested for toxicity in mice. Aggregated SWNTs induced granulomas, but functionalized “molecule-like” SWNTs were excreted safely.

The authors make a case for establishing a new geological epoch, the Anthropocene, to recognize the impact of humans on the Earth’s evolution.