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Active capillary waves: can bacteria wrestle with surface tension?

In the world of microswimmers, such as motile bacteria or spermatozoa, surface tension is a formidable force. This is, possibly, the reason why few mechanisms of activity-driven capillary waves have been studied theoretically and experimentally. In this talk I will argue that this task is not hopeless and present a new type of activity-induced interfacial instability.