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10 Innovations in Water Purification
science.howstuffworks.com/environmental/green-tech/sustainable/10-innovations-water-purification.htm
As far back as 1500 B.C.E., people were trying to purify water to make it drinkable. And we're still at it. Today inventors use tools as simple as clay and as sophisticated as carbon nanotubes to bring clean water to the world.
NASCAR Race Car Tracks
auto.howstuffworks.com/auto-racing/nascar/race-tracks/nascar-tracks.htm
Each NASCAR race car track is as unique as its location. Find out more about the individual features of the tracks, and view pictures and diagrams.
Bird-Watching Projects for Kids
lifestyle.howstuffworks.com/family/activities/bird-watching-projects-for-kids.htm
These bird-watching projects for kids are a great introduction to the hobby of birding. Learn about some interesting bird-watching projects for kids.
In Honor of Martin Luther King Jr.
people.howstuffworks.com/culture-traditions/holidays-other/mlk-jr.htm
The national American holiday honoring Dr. Martin Luther King, Jr. falls on the third Monday in January. Learn about the life and work of this legendary civil rights activist.
Christmas Trivia
people.howstuffworks.com/culture-traditions/holidays-christmas/christmas-trivia.htm
Test your Christmas trivia knowledge in the areas of songs, movies and more. Uncover amazing facts as you test your Christmas trivia knowledge.