This is the cover page of Chaos: An Interdisciplinary Journal of Nonlinear Science, Volume 18, No. 2, June 2008. The cover features the issue feature: "Design and Control of Self-Organization in Distributed Active Systems."
This is the cover page of the Journal of Physical Chemistry A Volume 108, Issue 8. The cover features the atricle: "Soft lithography [which] allows the study of self-organizing patterns such as spiral waves in complex microreactors."