Jennifer Glass' new article entitled, "Coevolution of metal availability and nitrogen assimilation in cyanobacteria and algae" is in press at Geobiology. It can be found at DOI: 10.1111/j.1472-4669.2009.00190.x. Coauthored with Felisa Wolfe-Simon and Ariel Anbar, this publication represents an important advance in our understanding of how the oxygenation of the early Earth was reflected in biological evolution.