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Your search for "concentrate" returned 1,621 results
What makes people happier -- objects or experiences?
science.howstuffworks.com/life/inside-the-mind/emotions/people-happier.htm
What makes people happier? A new car or an exciting or touching experience? Is it the gifts or the memories? See research on what makes people happier.
What Is Gravity?
science.howstuffworks.com/environmental/earth/geophysics/question232.htm
Gravity is the force that causes two particles to pull towards each other. Learn about gravity and find out how Newton and Einstein explain gravity.
7 Health Problems for the Modern Age
health.howstuffworks.com/medicine/modern-technology/7-health-problems-for-the-modern-age.htm
While your iPod may bring you hours of enjoyment, it could also cause health problems. Read our list of seven health problems for the modern age.
Centurion Main Battle Tank
science.howstuffworks.com/centurion-main-battle-tank.htm
The Centurion Main Battle Tank was heavily armed and used by many countries. Learn the history and design of Britain's Centurion Main Battle Tank.
How to Repair a Garage Door
home.howstuffworks.com/home-improvement/repair/how-to-repair-a-garage-door.htm
There are two main components to a garage door: the door itself and the opener. If you can make both types of repairs, your garage-door problems will be minimal. Learn how to repair a garage door.
10 Ways Grocery Stores Trick You Into Spending More
How do stores convince you to buy more stuff? Read about 10 ways grocery stores trick you into spending more.
How to Get Rid of Age Spots
health.howstuffworks.com/skin-care/problems/treating/get-rid-of-age-spots.htm
Getting rid of age spots is tricky. Learn how to get rid of age spots at HowStuffWorks.
How Flying Humvees Will Work
auto.howstuffworks.com/flying-humvee.htm
How will flying Humvees work? Read about the Pentagon's plans to make Humvees fly at HowStuffWorks.
How to Get Rid of Foot Odor
health.howstuffworks.com/wellness/men/sweating-odor/how-to-get-rid-of-foot-odor.htm
Want to know how to get rid of foot odor? Visit HowStuffWorks to learn how to get rid of foot odor.
How Automotive Fine-Tuning Works
auto.howstuffworks.com/under-the-hood/auto-manufacturing/automotive-fine-tuning.htm
Automotive fine-tuning requires great attention to detail. Visit HowStuffWorks to learn all about automotive fine-tuning.