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What Is Ectoplasm?

science.howstuffworks.com/science-vs-myth/unexplained-phenomena/ectoplasm.htm

Obviously, if we had more evidence of the existence of ghosts, we wouldn't all spend so much time debating the matter. Believers in the supernatural, however, are convinced a substance called "ectoplasm" proves ghosts are real -- but are they right?

What Kind of Number Am I?

play.howstuffworks.com/quiz/what-kind-of-number-am-i-1

Everything in the universe comes down to numbers. There's a baffling mathematical symmetry to everything no matter how disorganized and chaotic it is. Numbers lie at the center of everything! But what numbers? Take the quiz and see what ones you know!

How many atoms are in a person?

science.howstuffworks.com/atoms-in-person.htm

Atoms: the building blocks of life and the universe. We're all made of these microscopic bits of matter, but how many does it take to make a complete human being? And exactly what kinds of atoms do we have inside us?

Freshwater Aquarium Fish

animals.howstuffworks.com/pets/freshwater-aquarium-fish.htm

Choosing the right fish for a freshwater aquarium depends on a number of factors, including the tank's size, the fish's diet, and more. Our fish profiles will allow you to select the perfect blend of fish, no matter how large or small your aquarium.

Situational Irony Can Be Funny, Tragic or Even Terrifying

entertainment.howstuffworks.com/arts/literature/situational-irony.htm

Irony is one of those things that everybody seems know about but few seem able to precisely define. To make matters more complicated still, there are different kinds of irony (cosmic irony, dramatic irony, verbal irony and so forth).

UFO Evidence

science.howstuffworks.com/space/aliens-ufos/ufo-evidence.htm

Does good UFO evidence exist? Can we find proof of UFOs? And if we did, would it matter? Scientists and laymen have searched for years. Read more about their hunt and how they try to solve the problem of UFO evidence.

What Style Sweater Matches Your Body Type?

play.howstuffworks.com/quiz/what-style-sweater-matches-your-body-type

Got silk? Or maybe, you "wool" rather choose a cashmere blend for the chilly sweater weather ahead! No matter what your stylish preferences are, it's time to come out of your "turtleneck" shell with this warm and fuzzy quiz!

What's the best way to add an interior wall to an existing structure?

home.howstuffworks.com/home-improvement/construction/planning/add-interior-wall-to-existing-structure.htm

Dreaming of busting up that large room you never use and turning it into two smaller ones? Here are some best practices for putting up an interior wall, no matter what sort of space you're starting out with.

Is humid air heavier than dry air?

science.howstuffworks.com/nature/climate-weather/atmospheric/is-humid-air-heavier-than-dry-air.htm

If humid air is just air plus water, then it has to be heavier than dry air, right? Sure, if it was only a matter of simple addition, but molecular physics is a lot like a bouncer at a club: Nothing gets in unless something else goes out.

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.

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