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How Optical Illusions Work

science.howstuffworks.com/optical-illusions.htm

It's a young lady! It's an old woman! It's a blue dress! No, it's gold! Why are we fooled by optical illusions and what do they tell us about how the brain works?

How Tessellations Work

science.howstuffworks.com/math-concepts/tessellations.htm

Mathematics achieves the sublime. Sometimes, as with tessellations, it rises to art. In their simplest form, tessellations consist of a single shape that repeats over a two-dimensional plane without any gaps. Why was M.C. Escher so fixated on them?

Occupational Psychologist Cary Cooper: Lack of Control Impacts Stress Levels

health.howstuffworks.com/wellness/stress-management/lack-of-control-impacts-stress-levels.htm

Having a lack of control impacts stress levels and health. Learn how a lack of control impacts stress levels at Discovery Health.

What Is Friendship?

people.howstuffworks.com/what-is-friendship.htm

Friendship is a platonic relationship between two people who care about each other. HowStuffWorks looks at different types of friendships and why they may end.

5 Flying Car Prototypes

auto.howstuffworks.com/5-flying-car-prototypes.htm

Could any of these 5 flying car prototypes become a regular-production reality? Take a look at these 5 flying car prototypes.

Lipitor: What You Need to Know

health.howstuffworks.com/medicine/medication/lipitor.htm

Lipitor is a cholesterol-lowering medication. Learn more about Lipitor at HowStuffWorks.

How Diabetes Works

health.howstuffworks.com/diseases-conditions/diabetes/diabetes.htm

In the U.S. alone, 20.8 million people have diabetes -- and about a third don't even know it. Find out some information you just may need.

Does human growth hormone slow the aging process?

health.howstuffworks.com/wellness/aging/anti-aging-tips/hgh-aging.htm

HGH aging prevention is a hot topic. Could this hormone reduce wrinkles, increase muscle mass and more? Take a look at HGH aging prevention.

Should you really starve a fever?

health.howstuffworks.com/diseases-conditions/cold-flu/starve-a-fever.htm

Should you really starve a fever? Get the biology behind how "starve a fever" could work and whether it's really advisable.

Skin Grafts

health.howstuffworks.com/skin-care/information/anatomy/skin-graft.htm

Skin grafts are patches of skin that are attached to help wounds heal. Even though it's incredibly painful, skin graft surgery can save lives.

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