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 (Brandy song) glad it did because it really showed where I was coming from musically and vocally [...] and I could relate to the lyrics of the song", Brandy said the following year in an interview with "MTV News". "It took him a while to understand my crazy ideas, but [...] he really challenged himself. If you listen to it, it's different from what he's already done in the past [...]" Brandy has characterised "Full Moon" as "ghetto", explaining that it is "pop and R&B at the same time [and] has a lot of elements to it." Lyrcially, the song deals with