3. Antarctica's biggest population center is the U.S.-operated McMurdo Station. In the summer, the community can swell to more than 1,000 people; this past winter, there were just 153.
4. Antarctica's two-letter Internet suffix is ".aq." Internet access is via satellite; a dish on Black Island provides 10-MB-per-second service to McMurdo.
5. Tourism is one of Antarctica's two main industries. Antarctica had 37,858 tourists last year. Most visitors arrived by sea -- a typical 10-day cruise to the region runs from $5,000 to $10,000 per person -- and nearly all landed on the Antarctic Peninsula. No ship carrying more than 500 passengers may land in Antarctica.
Link | Antarctic Treaty | Image: NASA