Rather than passively filter-feeding, the birds use their heads, beaks and feet to generate motion in the water that funnels invertebrates into their mouths ...

Each of those motions creates a tornado-like vortex and an upwelling of particles from the bottom toward the water’s surface. Further observation and experiments with the mechanical beak ...

[Ben Krasnow’s] water vortex machine has been an exhibit in the lobby of the San Jose City Hall for quite some time now. Unfortuantely he recently had to perform some repair work on it due to ...