Gravity waves (GWs) are atmospheric waves that commonly arise from irregularities in the fluid motion, such as wind flow over topography (e.g. mountain or lee waves) or from deep atmospheric ...

LONDON, England (CNN) -- Lee Byung-hun's arrival in the packed auditorium at a London screening of his latest film, "The Good, The Bad, The Weird," causes a well-behaved sizzle of excitement to ...