PBS
Pbs: Everest
The companion web site to NOVA programs on Mt. Everest: Lost on Everest, High Exposure: Humans at Altitude, Climb, History and Culture, Earth, Wind, and ice, Previous Expeditions, and Resources.
Royal Geographical Society
Royal Geographical Society: Mount Everest and Its Ascent
How was Mount Everest formed and how was it first conquered by man? What challenges are faced by a climber? Learn all about Mount Everest here.
NASA
Nasa: What Is Trigometry Good For?
This site from NASA is for anyone who has ever asked "Why do I need to know this," this is a must read for you. It documents historical uses of trigonometry.