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Portland Cement: A Concrete History With Structural Integrity
science.howstuffworks.com/innovation/inventions/portland-cement.htm
Invented in 1824, Portland cement remains prominent in modern construction. Learn about the hydraulic binder's raw materials and applications.
What Does Airplane Mode Do? And Can It Save Battery Life?
electronics.howstuffworks.com/how-to-tech/what-does-airplane-mode-do.htm
Why do flight attendants instruct us to turn our mobile devices on airplane mode before takeoff? And what does airplane mode even do?
What Are Muscle 'Knots' and How Do You Get Rid of Them?
health.howstuffworks.com/human-body/systems/musculoskeletal/muscle-knots.htm
Surely you've had a knot in your neck at some point. But your muscles really aren't tied in knots. Or are they?
What Is Number Theory?
science.howstuffworks.com/math-concepts/number-theory.htm
For many of us, a number is just a number, a bit of information that tells you, say, what time it is. But mathematicians look at that same number and divine relationships that underlie nature itself. Ready to enter the trippy world of number theory?
What's the Secret Behind the Numbers on the Interstate Signs?
auto.howstuffworks.com/numbers-on-interstate-signs.htm
Why is one road named I-5 while another is I-480? We take a closer look at the digits on those red, white and blue shield-shaped signs.
The Spiritual and Emotional Meaning Behind Teardrop Tattoos
people.howstuffworks.com/culture-traditions/body-art/tear-drop-tattoo-meaning.htm
The teardrop tattoo holds a dark secret most people don't know. Discover the shocking prison origins, how its placement changes everything, and why this small ink mark can tell someone's entire life story without saying a word.
20 Old Money Last Names That Scream Aristocracy
people.howstuffworks.com/culture-traditions/genealogy/old-money-last-names.htm
We're sure there's been a time when you heard a surname and immediately thought, "Ah, wealth." That reaction isn’t random. Old money last names carry a reputation built over generations of shaping culture, politics, and global finance.
What Are the 10 Worst Torture Methods and Why?
science.howstuffworks.com/five-forms-of-torture.htm
The most prevalent forms of torture have been identified in a book by the CODESRIA organization. Learn about the most prevalent forms of torture.
How Brainwashing Works
science.howstuffworks.com/life/inside-the-mind/human-brain/brainwashing.htm
Brainwashing is the attempt to change the thoughts and beliefs of another person against their will. Learn about the science behind brainwashing.
How Hereditary Illnesses Work
science.howstuffworks.com/life/genetic/how-hereditary-illnesses-work.htm
Hereditary illnesses can be frightening to new parents, but they are usually rare. Learn about various genetic diseases and their causes.