In the second installment of the CEE Distinguished Speaker Series (DSS), Professor Emmanuel Villermaux discussed the theory of fragmentation in relation to the forced radial expansion of a spherical liquid shell, or bubble. Providing a widespread explanation of the fragmentation process, Villermaux’s stimulating lecture drew in a full audience on the evening of Monday, March 30. “You want to disaggregate something, which is cohesive, and then you wonder what the fragments will be,” Villermaux prefaced his lecture. “The concept I will discuss concerns all the phenomenon where cohesive forces compete with disaggregation forces.” For details on the next DSS event, please see the website.