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
What Kind of Fool What Kind of Fool "What Kind of Fool" is the title of a vocal duet from 1981 (see 1981 in music) by singers Barbra Streisand and Barry Gibb. The song was written by Gibb and Albhy Galuten. The songs on the "Guilty" album were a collaboration between Streisand and all the members of the Bee Gees, including Barry's brothers, Robin and Maurice Gibb. But Barry Gibb played the largest role of the brothers on the album, co-writing and co-producing all of the tracks, appearing on the album cover embracing Streisand, and singing two duets with her. Co-producer Karl Richardson was