Crust (geology) enriched compared to the underlying mantle. Although the continental crust comprises only about 0.6 weight percent of the silicate on Earth, it contains 20% to 70% of the incompatible elements. All the other constituents except water occur only in very small quantities and total less than 1%. Estimates of average density for the upper crust range between 2.69 and 2.74 g/cm and for lower crust between 3.0 and 3.25 g/cm. Earth formed approximately 4.6 billion years ago from a disk of dust and gas orbiting the newly formed Sun. It formed via accretion, where planetesimals and other smaller rocky bodies
And What Will We Do Tomorrow? And What Will We Do Tomorrow? "And What Will We Do Tomorrow" is a short story by Orson Scott Card. It first appeared in his short story collection "Capitol" and then later in "The Worthing Saga". This story is about Mother the empress of Capitol. In it she wakes up from suspended animation for her one waking day every five years and meets with all of her ministers. All of them try lying to her except for the minister of colonization who doesn’t know anything about what is going on in his department. She sends him away and asks to