Structure of the Earth the crust, upper mantle, lower mantle, outer core, and inner core. The geologic component layers of Earth are at the following depths below the surface: The layering of Earth has been inferred indirectly using the time of travel of refracted and reflected seismic waves created by earthquakes. The core does not allow shear waves to pass through it, while the speed of travel (seismic velocity) is different in other layers. The changes in seismic velocity between different layers causes refraction owing to Snell's law, like light bending as it passes through a prism. Likewise, reflections are caused by a large
What Would We Do Without You? Do Without You?" is a song taken from the Stephen Sondheim musical, "Company". What Would We Do Without You? "What Would We Do Without You?" is the 69th episode of the ABC television series "Desperate Housewives". It was also the twenty-second episode of the show's third season. It was written by Bob Daily and directed by Larry Shaw. The episode aired on May 13, 2007. Ricardo Antonio Chavira submitted this episode for consideration on his behalf in the category of "Outstanding Supporting Actor in a Comedy Series" at the 2007 Emmy Awards. Mike and Susan go out to dinner, the