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How to Get Hard Water Stains Out of Your Toilet
Minerals may be good for the body, but they're not so great for the toilet. How can you remove those nasty hard water stains they leave in your toilet bowl anyway?
Communicating With Aliens Is Hard. Communicating With Alien AI Could Be Harder
If you think about it, it'll likely be an alien machine that encounters our probes searching for intelligent life. How's that going to work?
¿Podrás aprobar esta difícil prueba de conocimientos generales si te damos pistas?
play.howstuffworks.com/quiz/can-you-pass-this-hard-general-knowledge-quiz-if-we-give-you-hints-sp
¡Oye cerebrito! ¿Sabes las respuestas a cada pregunta de trivias al azar sin recurrir a Google? Si es así, ¡quizás tengas lo necesario para dominar este difícil quiz de conocimientos generales!
If You Were Born After 1964, You'll Have a Hard Time Passing This Food Quiz
We're going back to the days of Velveeta and Jell-O. Warning: Opening this quiz may take you down memory lane and have you rushing to the grocery store.
This Physics Quiz Is Really Hard, So We'll Be Impressed If You Get Even 10 Right
How will you REACT to this quiz? We're bringing in the big brains of physics to see if we can stump you. Do you have what it takes to pass without cheating?
Can You Pass This Hard Dog Breed Identification Quiz?
Man's best friend can be cute, cuddly, big or dependable. But do you know all the breeds by sight? Take this quiz and find out if you can name each of these breeds from a single screenshot!
This Cattle Breed Identification Quiz Is Really Hard, So We'll Be Impressed If You Even Get Four Right
Most people don't give cattle a second thought, so long as they have access to milk and hamburgers. But if you fancy yourself a real cowboy or cowgirl, maybe a cowperson, then let's see how many you can identify! No bull, just a quiz!
This Horse Breed Identification Quiz Is Really Hard, So We'll Be Impressed If You Even Get 4 Right
Have you been described as a horse person? Do you find that you know more about horses than most people? If you know the difference between a quarter horse and a thoroughbred, test your knowledge with this quiz!
Why do eggs turn hard when you boil them?
recipes.howstuffworks.com/menus/question616.htm
Ever wondered why eggs turn hard when you boil them? Check out this article to find out just why eggs turn hard when you boil them.
What is the difference between soft money and hard money campaign donations?
money.howstuffworks.com/question498.htm
Soft and hard money describe specific types of political campaign donations. Learn the difference between soft and hard money in this article.