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Cinnabar: Red, Beautiful — and Toxic

science.howstuffworks.com/environmental/earth/geology/cinnabar.htm

Cinnabar's bright-red pigment has been used in jewelry, pottery and makeup for millennia. But cinnabar is also the primary ore for mercury, making it a dangerous mineral if the particles are inhaled.

Primary Colors Are Red, Yellow and Blue, Right? Not Exactly

science.howstuffworks.com/primary-colors.htm

Primary colors are the blocks from which all other colors are built. But there's a lot more to know about them than the basic red, yellow and blue we learned about in kindergarten.

Warm Colors Range From Sunny Yellows to Luscious Reds

entertainment.howstuffworks.com/arts/artwork/warm-colors.htm

Warm colors — including reds, oranges and yellows — evoke feelings of energy, passion and warmth. Warm and cool colors play off each other, with warm tones taking center stage when you want to create a lively, inviting atmosphere.

Is Cat Drooling a Red Flag? When to Act

animals.howstuffworks.com/pets/cat-drooling.htm

If you’ve ever caught your kitty with a bit of slobber around their chin, you might be wondering: Is cat drooling normal? In some cases, yes — but other times, it’s a red flag that something’s not right with your pet’s health.

Exploring Mars: Insights Into the Red Planet

science.howstuffworks.com/mars.htm

Since the 1960s, we've been captivated by the planet Mars. How different is our neighbor, and what have we learned about the most explored planet?

Which Is the Sweetest Grapefruit — White, Red or Pink?

recipes.howstuffworks.com/sweetest-grapefruit.htm

Does your mouth get all excited at the thought of eating a juicy grapefruit? Well, pucker up, because grapefruit is loaded with the vitamins and antioxidants your body needs.

Lightsaber Color Meanings: From Sith Red to Jedi Green

entertainment.howstuffworks.com/lightsaber-color-meanings.htm

In the sci-fi movie universe of "Star Wars," the lightsaber isn't just a weapon; it's a beacon of identity. Beyond their mesmerizing glow and formidable power, the hues of these legendary weapons carry deep, symbolic significance, each color unveiling a layer of the wielder's identity, philosophy and allegiance.

The Waffle House Index Is at Code Red; That's Not Good

people.howstuffworks.com/waffle-house-index.htm

What is the Waffle House Index anyway, and does the Federal Emergency Management Agency really use it to gauge local disasters?

How Dangerous Is Wildfire Smoke? A Toxicologist Is Raising Red Flags

science.howstuffworks.com/nature/natural-disasters/wildfire-smoke-news.htm

The effects of wildfire smoke are different than those of other types of air pollution. But just how harmful to humans is it?

Red Roses or Yellow? Every Flower Has a Secret Meaning

people.howstuffworks.com/culture-traditions/cultural-traditions/floriography.htm

Floriography - the association of flowers with special virtues and sentiments - has been a practice from antiquity to the present day.

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