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The risks of overtraining include an increased chance of injury. Learn how to gauge whether you're overtraining.

Deserts around the world are slowly expanding. HowStuffWorks checks out the science behind these increases in size.

Pure oxygen in an engine would produce a dramatic increase in horsepower. Learn about pumping pure oxygen in an engine.

Trying to find a four-leaf clover? Increase your odds of finding a lucky four-leaf clover with these tips.

Will replacing your car's stock muffler with a performance muffler actually increase horsepower? Find out at HowStuffWorks.

The world's population passed 8 billion in 2022, but which countries contributed the most to the increase? Here are the top seven countries

Natural camouflage is an amazing thing - it increases an animal's chances of survival by tricking predators. Learn all about animal camouflage.

U.S. criminal records are on the increase in recent years. Find out how U.S. criminal records work.

Puffy eyes are a symptom of increased anxiety, stress, and sleeplessness. Learn about the home remedies available to treat puffy eyes.

Ubuntu is a free computer operating system that has been increasing in popularity. Find out what Ubuntu is all about.

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