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How Tunnels Work

science.howstuffworks.com/engineering/structural/tunnel.htm

Constructing a tunnel is one of the most complex challenges in the field of civil engineering. Learn about the basics behind tunnels.

A Guide to Botanicals for Seniors

health.howstuffworks.com/wellness/food-nutrition/vitamin-supplements/botanicals-seniors.htm

Botanicals have been receiving a lot of press lately, but they can be dangerous. Learn about the safety of botanicals for seniors.

What are the safety concerns of fuel cells?

auto.howstuffworks.com/fuel-efficiency/alternative-fuels/safety-concerns-of-fuel-cells.htm

What are the safety concerns of fuel cells? Check out HowStuffWorks.com to learn the safety concerns of fuel cells.

Whiten Teeth With Strawberries

recipes.howstuffworks.com/whiten-teeth-with-strawberries.htm

An alabaster smile is only a strawberry and some baking soda away. Learn more about whiten teeth with strawberries.

Pregnancy Nutrition Guidelines

health.howstuffworks.com/wellness/food-nutrition/facts/pregnancy-nutrition-guidelines.htm

Nutrition is of vital importance while you are pregnant. Learn how important weight gain is during pregnancy and what foods to avoid.

How Black Boxes Work

science.howstuffworks.com/transport/flight/modern/black-box.htm

Black boxes help investigators determine what happened in an airplane accident. What's inside a black box and how does it record flight data?

Essential Oils 101

health.howstuffworks.com/wellness/natural-medicine/aromatherapy/how-essential-oils-work.htm

Knowing how essential oils work will help you be able to buy and store this integral part of aromatherapy treatments. Learn how essential oils work.

If I Have a Gas Leak in My Home, Will I Die?

home.howstuffworks.com/home-improvement/household-safety/gas-leak-home.htm

A gas leak is not a good thing. There's a reason it has that awful odor -- to warn you of danger. Learn more about the dangers of a gas leak.

Why Are Moose Dangerous, Even More Threatening Than Bears?

animals.howstuffworks.com/animal-facts/dangerous-moose.htm

Most people are more afraid of bears in the wild than moose. But, in Alaska, you're more likely to be injured by a moose than a bear. Find out why.

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