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Did the Mayan civilization end because of climate change?
science.howstuffworks.com/environmental/green-science/climate-change-end-mayan-civilization.htm
Over the years, many theories have been advanced about why the once-mighty Mayan civilization fell. But a newer one is getting attention: Was it because of climate change?
How Free Speech Works
people.howstuffworks.com/free-speech.htm
In the U.S., can you truly say anything you want, or are there limits? Find out how free speech works at HowStuffWorks.
10 Worst Ways History Has Repeated Itself
history.howstuffworks.com/historical-events/10-worst-ways-history-has-repeated-itself.htm
As they say, if we don't learn from history, we're doomed to repeat it. And as these 10 historical events prove, humans seem to be more prone to repeating than learning.
Ultimate Guide to Elmo
lifestyle.howstuffworks.com/family/activities/how-elmo-works.htm
Elmo, the furry red Muppet on 'Sesame Street,' is the most recognized children's character in the United States. Read this in-depth look at Elmo.
How Uranium Mining Works
science.howstuffworks.com/uranium-mining.htm
Thanks to our voracious appetite for energy, the element long linked with nuclear weapons is taking on a new role. Where does the hunt begin for uranium?
How Crayons Work
entertainment.howstuffworks.com/arts/artwork/crayons.htm
Crayons are steeped in the artwork of our childhoods. How did these popular little sticks of color actually come about? Find out from HowStuffWorks.
5 Chimps Who Grew Up in Human Families
animals.howstuffworks.com/mammals/5-chimps-who-grew-up-in-human-families.htm
HowStuffWorks looks at five families found out the hard way that chimps will always be chimps.
Can You Guess the Distance Between These Two Cities?
play.howstuffworks.com/quiz/can-you-guess-the-distance-between-these-two-cities
Can you squeeze in a trip to both Disney World in Orlando and Disneyland in Anaheim in a single day? The reality of getting from one city to another looms larger in real life than it does when staring at a map. Take our quiz to guess how far apart these pairs of cities lie from one another!
How Tipping Works
people.howstuffworks.com/tipping.htm
Tipping is a multibillion-dollar industry that varies around the globe. Learn more about how tipping works in the United States and internationally.
How Hydroponics Works
home.howstuffworks.com/lawn-garden/professional-landscaping/hydroponics.htm
Hydroponics is the practice of growing plants without soil. Learn more about how hydroponics uses water as the nutrients for plants.