Prosperetti, Andrea2020-03-102020-03-104/28/2004Copyright 2004 Physics of Fluids. Recommended citation: Prosperetti, Andrea. "Bubbles." Physics of fluids 16, no. 6 (2004): 1852-1865. DOI: 10.1063/1.1695308 URL: https://aip.scitation.org/doi/abs/10.1063/1.1695308 Reproduced in accordance with the original publisher’s licensing terms and with permission from the author(s).https://hdl.handle.net/10657/6120Vanitas vanitatum et omnia vanitas: bubbles are emptiness, non-liquid, a tiny cloud shielding a mathematical singularity. Born from chance, a violent and brief life ending in the union with the (nearly) infinite. But a wealth of phenomena spring forth from this nothingness: underwater noise, sonoluminescence, boiling, and many others. Some recent results on a “blinking bubble” micropump and vapor bubbles in sound fields are outlined. The last section describes Leonardo da Vinci’s observation of the non-rectlinear ascent of buoyant bubbles and justifies the name Leonardo’s paradox recently attributed to this phenomenon.en-USMicrofluidicsSonoluminescenceUnderwater acousticsarticle