Four-wave mixing A weak optical signal (red) from a spacecraft transmitter can be amplified noise-free when it encounters two pump waves (blue and green) in a receiver on Earth. (Courtesy: Chalmers ...

Figure 1: Reduction of dissipation rates produced by breaking internal waves near the Equator. The agreement between observations and theory at low latitudes is better than expected (F. Henyey, ...

The chaos from skyscraper-tall waves breaking deep underwater has been captured for the first time, researchers say. Turbulence from these waves can generate thousands of times more mixing in the deep ...