Summer brings with it the sight of surfers moving seamlessly across wave crests, with ocean waters carrying them along coastlines. A team of scientists has now created a similar phenomenon—with small objects rather than surfers—that can be controlled by humans rather than by nature.

Through a series of experiments on a replicated mini-beach, NYU researchers show how water waves can be used to move floating objects or hold them firmly in place—all without direct touch or contact.

“Our study shows how beaming water waves at a floating object can cause it to move sideways or be ‘tweezed’ and held precisely in place,” explains Leif Ristroph, a professor at New York University’s Courant Institute School of Mathematics, Computing, and Data Science and the senior author of the study, which appears in the journal Physical Review Fluids. “These surprising effects could be used to manipulate particles and structures, controlling their motions and positions.”