100 kilometers (62 miles) to the upper edge of the atmosphere; the celestial sphere extends indefinitely.
From 0 to -10,971 meters (-35,994 feet), -3,790 meters (-12,430 feet) on average and more than half of it's area over -3,000 meters (-9,800 feet).
An amoral sociopath who believes that human decency is the greatest evil in the world, and who once gave a three-hour long diatribe on the subject.
42.