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Nature Physics 5, 88 (1 February 2009) | doi:10.1038/nphys1187

Fluid dynamics: Bounce into chaos

Dan Csontos

Intuitively we expect that two volumes of the same liquid brought into contact will merge. But, let a droplet fall onto a vertically oscillating bath of the same fluid and, under the right conditions, it can be made to bounce indefinitely.