Volcano were proposed for volcano behavior before the modern understanding of the Earth's mantle structure as a semisolid material was developed. For decades after awareness that compression and radioactive materials may be heat sources, their contributions were specifically discounted. Volcanic action was often attributed to chemical reactions and a thin layer of molten rock near the surface. Volcano A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. Earth's volcanoes occur because its crust is broken into 17 major,
When It Rains, It Pours (30 Rock) could have a big-time comeback on our hands." Juli Weiner of "Vanity Fair" wrote that Paul Giamatti was a delight as his "30 Rock" character. "Entertainment Weekly" contributor Annie Barrett was thrilled that the Tracy character was a contestant on "Cash Cab", noting once the game began "everything felt so right". Samantha Urban of "The Dallas Morning News" preferred "When It Rains, It Pours" to the episodes of "Community" and "The Office", which aired on NBC the same night. Brad Sanders of the "Indiana Daily Student" wrote that Giamatti played his part brilliantly, and that his involvement in the main