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Tanzanite Is Africa's Real Blue Diamond
science.howstuffworks.com/environmental/earth/geology/tanzanite.htm
Tanzanite is so rare, it is sourced from just an 8-square-mile (20-square-kilometer) area in Tanzania. It was first discovered in the late 1960s and it burst onto the jewelry scene thanks to Tiffany & Co.
Frances Kelsey Stopped Thalidomide in Its Tracks, and Changed the FDA Forever
history.howstuffworks.com/historical-figures/frances-kelsey-thalidomide.htm
Frances Kelsey saved countless lives when she decided not to approve a drug for morning sickness in the 1960s. Her instinct was spot-on and has had lasting effects on FDA drug approval ever since.
It's a Small World, and It's Wiping Out Languages
people.howstuffworks.com/small-world-extinct-languages.htm
Thousands of languages are threatened with extinction. Learn more about vanishing languages at HowStuffWorks.
How White Matter Helps the Brain's Gray Matter Function
health.howstuffworks.com/human-body/systems/nervous-system/brains-white-matter-news.htm
We've all heard of the brain's gray matter, but what about the white matter? What does it do?
Not Just Rocks: The Geology Quiz
play.howstuffworks.com/quiz/geology-quiz
Geologists study the processes and substances that form Earth. Most of those processes happen over millions of years, but this quiz only takes a few minutes! Find out how rock solid your knowledge of geology is.
Why is there a metallic taste in my mouth?
health.howstuffworks.com/wellness/oral-care/problems/metallic-taste-in-mouth.htm
There are multiple reasons you may have a metallic taste in your mouth. Learn why there might be a metallic taste in your mouth.
Mezcal vs. Tequila: A Guide to Agave-based Spirits
recipes.howstuffworks.com/mezcal-vs-tequila.htm
Tequila and mezcal are two of the most famous agave-based spirits from Mexico, and bartenders sometimes use them interchangeably in mixed drinks. Mezcal cocktails will often have a smokier flavor than ones made with tequila, but what are the other differences?
The Longest Breath Hold Was Longer Than a Sitcom Episode
entertainment.howstuffworks.com/longest-breath-hold.htm
It's one of the easiest human feats to attempt but one of the hardest to persist at - because when the urge to breathe hits, it hits hard, and it can seem impossible to keep going.
5 Low-sodium Cheeses
recipes.howstuffworks.com/5-low-sodium-cheeses.htm
If you love cheese, but are watching your sodium, that doesn't mean you have to cut it out of your diet completely. Here are five cheeses that are low in sodium that you can still eat, in moderation.
Has the free enterprise system prevailed?
money.howstuffworks.com/free-enterprise-system.htm
The free enterprise system offers unfettered industry powered by profit-focused individuals. Learn about the free enterprise system in this article.