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Towering Obelisks Are Everywhere. Here's Why They're So Awe-inspiring
science.howstuffworks.com/engineering/architecture/obelisk.htm
Obelisks can be found in cities throughout the world, from Washington, D.C., to Paris, France. But what is the origin of these massive structures?
Deadly 1948 Donora Smog Launched the U.S. Clean Air Movement
A killer smog 70 years ago helped lead to the first federal air pollution laws.
Color Wheel Theory: How to Talk About Color
science.howstuffworks.com/color-wheel-theory-how-to-talk-about-color.htm
Modern color theory got its start with, believe it or not, Sir Isaac Newton, who also discovered a little thing called gravity and invented calculus.
Iterative Evolution: Did the Aldabra Rail Evolve Twice?
science.howstuffworks.com/life/evolution/iterative-evolution.htm
The flightless Aldabra rail only lives on the Aldabra Atoll in Madagascar. But this example of iterative evolution descended from birds that soar.
Survivor Guilt: Living Through Major Trauma
health.howstuffworks.com/mental-health/human-nature/survivor-guilt.htm
The suicides of two survivors of a mass school shooting show how long trauma lingers. HowStuffWorks looks how and why we process survivor guilt.
Exercise During Pregnancy
Exercise during pregnancy to keep you and the baby healthy. Learn how to exercise during pregnancy at Discovery Health.
Do All Scottish Families Have a Tartan?
history.howstuffworks.com/european-history/scottish-tartan.htm
The kilt is synonymous with Scotland, but does that mean everyone with a Scottish surname has his or her own tartan?
Can You Pass This World History Quiz?
play.howstuffworks.com/quiz/can-you-pass-this-world-history-quiz
It's easy to know the history of your own country, but just how much do you know about the history of the entire world around you? Find out now with this world history quiz!
Can You Pass a 1980s Trivia Quiz?
play.howstuffworks.com/quiz/can-you-pass-a-1980s-trivia-quiz
The '80s were an incredibly eventful decade of the 20th century. From wars to political standoffs to wacky cultural changes, the '80s had it all. Can you pass muster against our tough '80s quiz?
Can You Pass This Canadian General Knowledge Quiz?
play.howstuffworks.com/quiz/can-you-pass-this-canadian-general-knowledge-quiz-learn
The land of snow and maple leaves - sometimes! Canada is a beautiful nation with lots of history and some fun facts. Think you know about the nation and its ways? Take the quiz to find out!