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How Mac OS X Works
computer.howstuffworks.com/macs/mac-os-x.htm
The Mac OS X was launched in 2001 with the Cheetah. Where did Mac OS X come from, and what technologies make it different from other operating systems?
X-ray Radiation Quiz
play.howstuffworks.com/quiz/x-ray-radiation-quiz
X-rays have revolutionized medical treatments and saved many lives, but despite their success, they produce radiation that can give rise to health problems. Take this quiz to test your knowledge of X-rays and how they affect our bodies.
Billions of Brood X Cicadas Are About to Get Loud
animals.howstuffworks.com/insects/brood-x-cicadas.htm
And we mean really loud. Like up to 100 decibels loud. Get all the buzz on what's making these bug-eyed bugs return.
How the BMW X6 ActiveHybrid Works
auto.howstuffworks.com/bmw-x6-activehybrid.htm
The BMW X6 ActiveHybrid concept blurs the line between SUV, hatchback and sports car. Read about the BMW X6 ActiveHybrid car.
P90X Diet: What You Need to Know
health.howstuffworks.com/wellness/diet-fitness/diets/p90x-diet.htm
The P90X diet goes along with the P90X workout. See the pros and cons of the P90X diet at HowStuffWorks.
Who Discovered X-Rays?
science.howstuffworks.com/innovation/inventions/who-invented-the-x-ray.htm
Who invented the x-ray is explained in this article from HowStuffWorks. Find out who invented the x-ray.
There Are More Animals That Start With 'X' Than You'd Expect
animals.howstuffworks.com/animal-facts/animals-that-start-with-x.htm
Scientists have developed several methods for grouping different members of the animal kingdom by species or unique characteristics. However, there is arguably no better method for learning fun facts than by listing animal names alphabetically. These are just a few animals that start with X.
Could an 'X17 Particle' Hint at a Fifth Force in the Universe?
science.howstuffworks.com/x17particle-fifth-force.htm
The Standard Model of physics is a framework for the subatomic world. Could a newfound carrier boson expand that framework? HowStuffWorks looks in.
The Ultimate Choosing a 4X4 Truck Quiz
play.howstuffworks.com/quiz/choosing-a-4x4-truck-quiz
Over the last 20 years, four-wheel-drive trucks have grown in popularity. There are so many models, in fact, that it may be difficult knowing how to pick one that's right for your needs. To get a better idea of how to choose the right vehicle, take this quiz.
Generation X: Are You a True Gen X-er?
play.howstuffworks.com/quiz/generation-x-are-you-a-true-gen-xer
Generation X was the first to enter into the digital age and '80's pop culture and music were fixtures of their childhood. Take this quiz to find out if you are a true Gen X-er.