Water waves can gain energy when they scatter from a whirlpool-like vortex. That is the conclusion of physicists in Brazil, Canada and the UK, who are the first to observe a phenomenon called ...

When bacteria band together, they can turn a fairly tame drop of water into a swirling vortex. The swirl is spun up by the bacteria’s tail-like flagella and the basic physics of how fluids flow, ...

You walk into an empty room by the sea, to find a perfectly circular hole punched out of the concrete floor where a vortex of water swirls and crashes with perfect rhythm. It sounds like an optical ...