Professor Martin Yarmush's work on using adhesive stencils to make mouse embryonic stem (mES) cell aggregates of specific sizes ranging from 100 um to 500 um in diameter was featured in Chemical Biology, Issue 9, 2007. Chemical Biology is a news magazine which draws together coverage from all Royal Society of Chemistry publications, providing a snapshot of the latest developments in chemical biology. The full paper describing this innovative work was published in Lab on a Chip volume 7, page 941(2007).