Science | Engineering | Materials Science

Explore how the use of natural and manmade materials further technology. Read articles on subjects such as nanotechnology, iron steel and reverse osmosis.

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The Ultimate Ultrasonic Welding Quiz

Ultrasonic welding is used widely in many industries -- including shoe manufacturing and auto making. How well do you know how this method uses sound to do what high temperatures normally do. Test your knowledge now.


How a Cold Heat Soldering Iron Works

How a Cold Heat Soldering Iron Works

Cold Heat soldering irons are lightweight, portable and don't come with the potential for serious injury. Learn more about Cold Heat soldering. See more »

How Sword Making Works

How Sword Making Works

The centuries-old art of sword making involves incredibly intricate metal work, and it's still being practiced today. Get a rare glimpse into the creation of this ancient weaponry. See more »

How Iron and Steel Work

How Iron and Steel Work

The refining of iron ore is one of the most historically significant achievements of all time. Find out how iron gets turned into steel and what it's used for. See more »