Earth tide lunar and the solar tidal maxima and minima (bulges and depressions) add together for the greatest tidal range at particular latitudes. At first- and third-quarter phases of the moon, lunar and solar tides are perpendicular, and the tidal range is at a minimum. The semi-diurnal tides go through one full cycle (a high and low tide) about once every 12 hours and one full cycle of maximum height (a spring and neap tide) about once every 14 days. The development of a systematic theory of Earth tides was started by George H. Darwin in 1879, and was then furthered by
Full Moon Features Stingers." In the tradition of the giant killer bug movies, "Deadly Stingers" was about giant scorpions taking over a town. However, after the film was completed, it was shelved due to a decline in the industry and low sales of another similar project at Fox (excluding Full Moon) entitled "Dark Wolf". The film was shown at the Frightvision Horror Festival in 2003, but while it has surfaced on Full Moon Streaming as of December 2013 under the name of "Mega Scorpions", it has yet to see a release on DVD or Blu-ray. A teaser trailer for the film does exist