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PMS 101

health.howstuffworks.com/wellness/women/menstrual/pms.htm

PMS refers to a collection of physical and psychological symptoms that some women experience monthly. Learn what causes PMS, how diet affects PMS and how to treat PMS.

10 Types of Soil and When to Use Each

home.howstuffworks.com/10-types-of-soil-and-when-to-use-each.htm

Are your lilies lackluster? Your daffodils a disaster? If you water your plants and ensure that they get enough sunlight, your garden's soil could be to blame. There's a lot more to dirt than you might think.

What Does 'BPA Free' Mean and Why Does It Matter?

science.howstuffworks.com/environmental/green-science/bpa.htm

The chemical BPA (bisphenol-a) often found in consumer goods, may be linked to human health problems. Learn more about BPA in polycarbonate plastics.

Xanthomas Overview

health.howstuffworks.com/skin-care/problems/medical/xanthomas.htm

Xanthomas are skin lesions that are often a sign of cell dysfunction. Learn more about how xanthomas work at HowStuffWorks.

How Toilets Work

home.howstuffworks.com/toilet.htm

The toilet. The john. The loo. The commode. The porcelain throne. No matter what you call it, there's no doubt it's a true technological marvel. Look beyond the commonplace bowl and see what a sophisticated water-handling system your toilet is.

14 Hardest College Majors With the Highest Attrition Rates

people.howstuffworks.com/hardest-college-majors.htm

Some college majors are years of all-nighters in disguise. The hardest college majors often demand a cocktail of grit, gray matter, and an unshakable love for complexity. Whether you're wrangling multivariable calculus or spending entire weekends on lab reports, these fields are not for the faint of heart.

How OSI Works

computer.howstuffworks.com/osi.htm

When information travels through a network, it follows certain guidelines to ensure compatibility. Find out about OSI and the protocol stacks that prepare your data for transfer.

Trinitite: How the First Nuclear Bomb Turned Sand to Glass

science.howstuffworks.com/trinitite-first-nuclear-bomb-turned-sand-to-glass.htm

Sand turned to glass at White Sands Missile Range. What do we know today about the remnants of the world's first nuclear blast?

How Psychologically Mature Are You?

play.howstuffworks.com/quiz/how-psychologically-mature-are-you

Maturity is thrown in the faces of kids all the time. Being called immature is such a dig, while being praised for "maturity beyond your years" is something to really work toward. But have you ever thought about what actually makes you mature or immature? Psychologically, there's a lot of information out there. But fear not! Take this quiz and we'll tell you how mature you are.

Magnesium Glycinate vs. Citrate Vitamin Supplements

health.howstuffworks.com/wellness/food-nutrition/vitamin-supplements/magnesium-glycinate-vs-citrate.htm

Magnesium glycinate and magnesium citrate are two similar sounding but distinct chemical compounds that can have differing effects on the human body when consumed orally. Both may also be effective at treating magnesium deficiency.

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