Researchers have now identified a less dramatic though far more pervasive source of acoustic-gravity waves: surface ocean waves, such as those that can be seen from a beach or the deck of a boat.

Tsunamis, also known as seismic sea waves, can be devastating. In 2004, a 100-foot wave in the Indian Ocean resulted in at least 230,000 deaths in one of the deadliest natural disasters in human ...

The terahertz quantum cascade laser on its mounting. Credit: University of Leeds Lasers that switch on and off billions of times per second are the backbone of optical communications networks, but ...