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What Is Sodium Nitrate in Processed Meats, and Is It Harmful?
recipes.howstuffworks.com/question233.htm
Sodium nitrate and its relative sodium nitrite are preservatives that you find in lots of processed meats. Learn why they add these preservatives to food.
7 Reasons a Cuttlefish May Be Smarter Than You
animals.howstuffworks.com/marine-life/cuttlefish.htm
A master of camouflage, the cuttlefish can count, gender-bend and use a hidden weapon to outsmart its enemies.
Another Strike Against the Black Jelly Bean
health.howstuffworks.com/wellness/food-nutrition/facts/another-strike-black-jelly-bean.htm
Eating great amounts of licorice can be a secondary cause of hypertension. Learn more at HowStuffWorks.
What's the Point of Car Alarms If Nobody Calls the Cops?
Which types of cars warrant purchasing a car alarm? It's not necessarily the fancy ones. HowStuffWorks explains.
Something Produced a Surprising Spike of Methane on Mars
science.howstuffworks.com/methane-spike-mars.htm
Of all the discoveries made on Mars, the detection of methane blowing in the air is probably the most compelling. HowStuffWorks investigates the Mars methane mystery.
Curtiss P-40 Warhawk
science.howstuffworks.com/curtiss-p-40-warhawk.htm
The Curtiss P-40 Warhawk is one of the best-liked airplanes of World War II, tough and virtually trouble-free, though its performance was never quite up to that of its opponents. Read about this most important American fighter plane of 1942-1943.
10 Common Indoor Air Pollutants
health.howstuffworks.com/wellness/common-indoor-air-pollutants.htm
You spend one third of your life asleep. But you spend your entire life breathing. Learn more about these 10 common indoor air pollutants.
The Spinning Mule's Impact on the Industrial Revolution
science.howstuffworks.com/innovation/inventions/spinning-mule.htm
The spinning mule shaped the textile industry and society as a whole during the Industrial Revolution. Read on to learn about the groundbreaking invention.
How the Metric System Works
science.howstuffworks.com/metric-system.htm
Ever heard of a little unit called a femtometer? Can you tell us how much you weigh -- in petagrams? We know you can't, so hurry up and start reading. We have work to do.
How much gold is there in the world?
money.howstuffworks.com/question213.htm
I recall hearing once that all of the world's gold could be formed into a cube measuring 18 feet by 18 feet on a side, or something like that. Is that true? If so, how much would it weigh and how much would it be worth?