Soft and spherical: Researchers study dynamics of drop impact
(PHYSorg.com Physics)

For the most part, fluid dynamics researchers have focused efforts to understand the details of impacting drops on flat rigid surfaces; the effect of curved, convex or compliant surfaces on the dynamics of impacting drops is still relatively unknown. This is despite its extreme relevance to modern-day applications, such as 3-D ink-jet printing and the delivery of pesticides on leaves.