Earth Earth is metamorphic rock, which is created from the transformation of pre-existing rock types through high pressures, high temperatures, or both. The most abundant silicate minerals on Earth's surface include quartz, feldspars, amphibole, mica, pyroxene and olivine. Common carbonate minerals include calcite (found in limestone) and dolomite. The elevation of the land surface varies from the low point of at the Dead Sea, to a maximum altitude of at the top of Mount Everest. The mean height of land above sea level is about . The pedosphere is the outermost layer of Earth's continental surface and is composed of soil
The Cyborg from Earth The Cyborg from Earth The Cyborg from Earth is a 1998 science fiction novel by Charles Sheffield. It is the fourth in a series of unrelated stories, published by Tor Books in their Jupiter line. The novel starts in a future dystopian Earth where the upper class lives a life of privilege, while most others live in the "pool", an endless crowd of unemployable youths depending on government assistance or crime for survival. The book is told from the perspective of the main character, Jefferson Kopal, a young member of an immensely wealthy and powerful spaceship building family founded by