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Has Earth reached its carrying capacity?
science.howstuffworks.com/environmental/green-science/earth-carrying-capacity.htm
Carrying capacity is the idea that sustainability requires balance. Learn about carrying capacity and human population.
How does the environment affect my skin?
health.howstuffworks.com/skin-care/information/health-factors/environment-affect-skin.htm
Want to know how the environment affects your skin? Visit HowStuffWorks to learn how the environment can affect your skin.
What is an emollient?
health.howstuffworks.com/skin-care/moisturizing/basics/emollient.htm
What is an emollient? Read what makes an emollient different from a humectant and how emollient creams can help fight dry skin.
How the Human Blockhead Works
entertainment.howstuffworks.com/arts/circus-arts/human-blockhead.htm
The human blockhead act involves a performer hammering a nail into their nostril. Learn about the human blockhead and how the human blockhead avoids injury.
A Nation Divided: Civil War Quiz
play.howstuffworks.com/quiz/civil-war-quiz
Although it ended more than a century ago, the scars of the Civil War are still with Americans today. Think you know more than the average Billy Yank or Johnny Reb about the blood and politics behind the war? Find out by taking our Civil War quiz.
How Steam Engines Work
science.howstuffworks.com/transport/engines-equipment/steam.htm
Steam engines powered all early locomotives, steam boats and factories -- they fueled the Industrial Revolution. Learn how the steam engine produces power!
1957, 1958, 1959 Chrysler New Yorker
auto.howstuffworks.com/1957-1959-chrysler-new-yorker.htm
The 1957-1959 Chrysler New Yorker flaunted the bold new re-design of the Chrysler line in the 1950s. Learn about the 1957-1959 Chrysler New Yorker.
1967, 1968, 1969 Chevrolet Camaro
auto.howstuffworks.com/1967-1969-chevrolet-camaro.htm
The 1967-1969 Chevrolet Camaro exploited the sporty compact market with its Super Sport. See photos and specifications of 1967-1969 Chevrolet Camaro.
1961, 1962, 1963, 1964 Chevrolet Impala Super Sport
auto.howstuffworks.com/1961-1964-chevrolet-impala-super-sport.htm
The 1961-1964 Chevrolet Impala Super Sport introduced the concept of a sporty full-size car. Learn more about the 1961-1964 Chevrolet Impala Super Sport.
How Mosquito Magnets Work
home.howstuffworks.com/mosquito-magnet.htm
There are different ways to control mosquitoes, but what if you wanted to get rid of mosquitoes for good? Learn how the Mosquito Magnet works.