Core–mantle boundary Core–mantle boundary The core–mantle boundary (CMB in the parlance of solid earth geophysicists) of the Earth lies between the planet's silicate mantle and its liquid iron-nickel outer core. This boundary is located at approximately 2891 km (1796 mi) depth beneath the Earth's surface. The boundary is observed via the discontinuity in seismic wave velocities at that depth due to the differences between the acoustic impedances of the solid mantle and the molten outer core. P-wave velocities are much slower in the outer core than in the deep mantle while S-waves do not exist at all in the liquid portion of
What Would We Do Without You? 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 night exactly a year after he and Susan were meant to get engaged