Scientists at The Australian National University (ANU) have created a water-based tractor beam. They first experimented with a table tennis ball floating in a wave tank, and then by precisely manipulating the size and frequency of three-dimensional waves, created by a wave generator to keep it in place, move it away from the generator, or even towards it. Continue reading for more information.

According to Gizmag, “It is hoped that if scaled up, their findings could be used in applications such as containing oil spills, retrieving drifting watercraft, or better understanding rip tides, in which swimmers are drawn away from the shore even though the waves are moving towards it.”