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How Air Curtains Work
home.howstuffworks.com/home-improvement/construction/green/air-curtains.htm
Is it possible for a stream of air to behave like a door? Surprisingly, yes. This door may not block out burglars, but it can certainly fight against cold winds, flying insects and pollutants.
How the MQ-9 Reaper Works
science.howstuffworks.com/reaper.htm
Early unmanned aerial vehicles (UAVs) primarily carried out reconnaissance missions in war zones, but the Reaper packs some serious heat. Is there anything more foreboding than a drone with a Hellfire missile?
How Nirvana Works
science.howstuffworks.com/science-vs-myth/extrasensory-perceptions/nirvana.htm
The word "nirvana" gets thrown around in conversation all the time, often to describe a state of joy or supreme happiness. Actually, it's more than that -- a whole lot more. Find out what nirvana is.
What causes a shark feeding frenzy?
animals.howstuffworks.com/fish/sharks/shark-feeding-frenzy.htm
A shark feeding frenzy occurs when multiple sharks fight for the same prey. Find out how a shark feeding frenzy plays out in the wild.
Is quitting smoking contagious?
health.howstuffworks.com/wellness/smoking-cessation/quitting-smoking-contagious.htm
Is quitting smoking contagious? Research suggests it could be. Peer pressure often drives smokers to quit. Learn whether quitting smoking is contagious.
How did the bald eagle get delisted as an endangered species?
animals.howstuffworks.com/endangered-species/bald-eagle-conservation.htm
Bald eagle conservation became crucial in saving America's national symbol. Learn how bald eagle conservation efforts took 40 years to delist this bird.
What are the dangers of hydrogen-powered vehicles?
auto.howstuffworks.com/fuel-efficiency/alternative-fuels/hydrogen-vehicle-danger.htm
What are some of the chemical dangers that might be associated with hydrogen-powered vehicles? Read about the hydrogen-powered vehicle dangers.
11 Home Remedies for Oily Hair
health.howstuffworks.com/wellness/natural-medicine/home-remedies/home-remedies-for-oily-hair.htm
Read about home remedies for oily hair, from tips on how to wash to rinses you can make in your kitchen.
Herbal Remedies for Ulcers
health.howstuffworks.com/wellness/natural-medicine/herbal-remedies/herbal-remedies-for-ulcers.htm
Learn about herbal remedies for ulcers, whether it is reducing stomach acid, preventing ulcers, or treating the discomfort of an ulcer.
Is the amount of mercury in CFLs more dangerous than the amount in fish?
science.howstuffworks.com/environmental/green-science/cfl-mercury.htm
Mercury in CFLs and fish are the best known sources of mercury exposure. Learn about mercury in CFLs and fish and find out which should cause more concern.