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Why is there an underground city beneath Beijing?
history.howstuffworks.com/historical-events/beijing-underground-city.htm
The Beijing underground city may sound like the stuff of legends, but it's a real place built to escape Soviets. Read about the Beijing underground city.
What Is Pi?
science.howstuffworks.com/math-concepts/pi.htm
Whether the circle is as big as planet Mars or as small as a tennis ball, the ratio of its circumference divided by its diameter will always equal pi (3.14). But why?
Boeing B-29 Superfortress
science.howstuffworks.com/boeing-b-29-superfortress.htm
The Boeing B-29 Superfortress was the biggest, most expensive gamble by the United States during World War II, built with incredibly high expectations on a tight deadline. Read about the big advances in aviation technology brought about by the B-29.
1955-1956 Dodge D-500
auto.howstuffworks.com/1955-1956-dodge-d-500.htm
The 1955-1956 Dodge D-500 helped Dodge re-define its vehicles as sleek and powerful machines. See pictures and a profile of the 1955-1956 Dodge D-500.
1969 Ford Mustang Boss 302 & 429
auto.howstuffworks.com/1969-ford-mustang-boss-302-429.htm
The 1969 Ford Mustang Boss 429 is one of the rarest of the 1969 Mustangs. Find out why and see photos of the 1969 Ford Mustang Boss 429.
1964, 1965, 1966, 1967 Chevrolet Chevelle Malibu SS
auto.howstuffworks.com/1964-1967-chevrolet-chevelle-malibu-ss.htm
The 1964-1967 Chevrolet Chevelle Malibu SS was the mid-size offering for Chevrolet. See photos and profiles of the 1964-1967 Chevrolet Chevelle Malibu SS.
1966-1967 Mercury Cyclone GT
auto.howstuffworks.com/1966-1967-mercury-cyclone-gt.htm
The 1966 Mercury Cyclone GT had smoother styling and a longer, 116-inch wheelbase. Learn more about the 1966 Mercury Cyclone GT.
1968-1969 Mercury Cyclone GT
auto.howstuffworks.com/1968-1969-mercury-cyclone-gt.htm
The 1968 Mercury Cyclone GT appeared longer and was restyled in the image of ready-to-roll muscle. Learn more about the 1968 Mercury Cyclone GT.
1963, 1964, 1965, 1966, 1967 Chevrolet Chevy II Nova SS
auto.howstuffworks.com/1963-1967-chevrolet-chevy-ii-nova-ss.htm
The 1963-1967 Chevrolet Chevy II Nova SS rivaled the Ford Falcon and Valiant compact cars. Learn more about the 1963-1967 Chevrolet Chevy II Nova SS.
How to Cash in Savings Bonds
money.howstuffworks.com/personal-finance/budgeting/how-to-cash-in-savings-bonds.htm
Learn how to cash in savings bonds in this article. Visit HowStuffWorks.com to read about how to cash in savings bonds.