About the cover
October 2007 Volume 3 No 10

Being able to make time- and space-keeping measurements such as when to stop dividing and when to die is essential for both cells and whole organisms. This issue features articles that examine how chemical and biological systems make measurements and regulate their own space and time. Revealing how organisms regulate events spatially and temporally brings our understanding of the cell and its individual processes to a more mechanistic level. Cover art by Erin Boyle, based on photographs by Andrzej Pastuszak and Mike Wade.
