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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.

Why do kids eat boogers?

health.howstuffworks.com/human-body/systems/nose-throat/why-do-kids-eat-boogers.htm

Kids eating boogers can be a common sight. But why do kids eat boogers to begin with? Find out at HowStuffWorks.

What's Your Dark Power?

play.howstuffworks.com/quiz/whats-your-dark-power

You might think your soul is made of rainbows and sunshine, but everyone has a bit of darkness in them that hasn't fully awoken yet. It's time for us to tap into your dark powers with this evil quiz!

Demon Face Syndrome: A Rare Neurological Disorder

health.howstuffworks.com/mental-health/neurological-conditions/demon-face-syndrome.htm

Your brain is your best friend — until it decides to go rogue. And that's pretty much what happens with demon face syndrome, aka prosopometamorphopsia, aka PMO.

Which Norse God or Goddess Reflects Your Soul?

play.howstuffworks.com/quiz/which-norse-god-goddess-reflects-rt

You're not some piddling mortal! You are a god! Well, a Norse god anyway. Which Norse god or goddess reflects your soul? Take this quiz to find out!

3 Major Types of Mushrooms: Edible, Wild and Poisonous

science.howstuffworks.com/life/biology-fields/types-of-mushrooms.htm

Some types of mushrooms are delicious and nutritious, while others are deadly and should never be eaten. Learning how to tell them apart is essential for both food lovers and foragers; knowing the difference between edible mushrooms and poisonous mushrooms can literally be a matter of life and death.

How Black Lights Work

science.howstuffworks.com/innovation/everyday-innovations/black-light.htm

Black lights cause everyday objects to glow in the dark. Learn how black lights work and about uses for different types of black lights.

Tyrannosaurus Rex Was the Tyrant Lizard King

animals.howstuffworks.com/dinosaurs/tyrannosaurus.htm

Tyrannosaurus rex, one of the fiercest meat-eaters ever, is the animal that probably springs to mind when most of us hear the word "dinosaur."

How Doctors Without Borders Works

money.howstuffworks.com/economics/volunteer/organizations/doctors-without-borders.htm

Doctors Without Borders provides medical help to war-torn or other devastated areas. Learn what it takes to work with Doctors Without Borders.

How to Improve Skin Tone Appearance on Camera

health.howstuffworks.com/skin-care/beauty/improve-skin-tone-on-camera.htm

Want to know how to improve skin tone on camera? Visit HowStuffWorks to learn how to improve your skin tone on camera.

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