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How 4D Printing Works

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Is 4D printing much different from 3-D printing? What if we told you some tech insiders are betting it has the potential to change industries from fashion to health care to defense?

How AIDS Works

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HIV continues to be a major global public health issue, having claimed more than 35 million lives so far.

How ASIMO Works

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The ASIMO by Honda is the most advanced humanoid robot in the world. Learn about the Honda ASIMO and find out why the ASIMO design is ideal for helping the disabled.

How Acid Rain Works

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Acid rain is caused by emissions of sulfur dioxide and nitrogen oxides from power plants, cars and factories. Find out how acid rain is produced.

How Acoustic Levitation Works

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The idea that something so intangible as acoustic levitation can lift objects may seem unbelievable, but it's a real phenomenon.

How Addiction Works: Exploring Substance Use Disorders

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Addiction to substances, such as drugs and alcohol, have ruined the lives of people all over the world. Read about current views and ideas on addiction.

How Adhesive Tape Works

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In 1925, after an auto paint job gone wrong, a young research assistant was struck by the idea for adhesive tape. But how does tape actually stick, and how are we able to peel it off a roll?

How Aerobatics Works

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Aerobatics in an airplane is an incredible display of skill and nerves. Learn about the history of aerobatics in this article from HowStuffWorks.

How Aerogels Work

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Aerogels are incredible materials that could have dozens of uses from insulation to oil spill cleanup. Learn about aerogels in this article.

How Aerosol Cans Work

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They dispense everything from hairspray to cleaning products to whipped cream. Without them, you'd be doing a whole lot of pumping.