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Towering Obelisks Are Everywhere. Here's Why They're So Awe-inspiring
science.howstuffworks.com/engineering/architecture/obelisk.htm
Obelisks can be found in cities throughout the world, from Washington, D.C., to Paris, France. But what is the origin of these massive structures?
Deadly 1948 Donora Smog Launched the U.S. Clean Air Movement
A killer smog 70 years ago helped lead to the first federal air pollution laws.
How to Make Slime
lifestyle.howstuffworks.com/crafts/science-projects/how-to-make-slime.htm
Making slime is a fun project to do at home or school - and it takes just a few everyday ingredients to pull it off. We've got some recipes inside.
Lava Tubes on Earth Could Prepare Us for Life on the Moon and Mars
science.howstuffworks.com/lava-tubes-on-earth-could-prepare-us-for-life-on-moon-and-mars.htm
By studying these geological formations here on Earth, we may be able to learn how to live on other planets.
Why Do We Find Waiting on Hold So Irritating?
money.howstuffworks.com/why-waiting-on-hold-so-irritating.htm
'Your call is very important to us...' Uh, really? Then why are you still on hold? HowStuffWorks looks at the art and science of being put on hold.
The Science Behind the Pollen Count
health.howstuffworks.com/diseases-conditions/allergies/outdoor-allergies/science-pollen-count.htm
HowStuffWorks looks at the science behind the pollen count. How do they count those microscopic grains anyway?
Spinosaurus Was a Good Floater but Lousy Swimmer
animals.howstuffworks.com/dinosaurs/spinosaurus-was-lousy-swimmer.htm
The villainous dinosaur from 'Jurassic Park' probably never had an affinity for water.
What's the environmental impact of the Deepwater Horizon oil spill?
science.howstuffworks.com/environmental/energy/deepwater-horizon-oil-spill.htm
The Deepwater Horizon oil spill is one of the worst oil spills in history, and its effects are largely still unknown. Learn about the Deepwater Horizon.
What are carotenoids?
health.howstuffworks.com/wellness/food-nutrition/vitamin-supplements/what-are-carotenoids.htm
What are carotenoids? Click here to learn exactly what carotenoids are.
Can Scientists Create a Star on Earth?
science.howstuffworks.com/create-star-on-earth.htm
Stars are enormous celestial bodies hot enough to register millions of degrees. They're fascinating scientific phenomena, but is it actually possible for scientists to create them?