Explore Treasures of the Earth
What Makes Diamond Sparkle?
Secrets of the Viking Sword
A modern-day swordsmith reverse engineers the ultimate weapon of the Middle Ages—a sword both prized and feared.
Treasures of the Earth
Harvesting Electricity From Sand
Making Steel From Trash
The Energy Lab Interactive
Use scientific data to design renewable energy systems for cities across the U.S., in this interactive from the NOVA Energy Lab.
A Primer of Gemstones
Hunting the Elements
A two-hour special from the producers of "Making Stuff"
Saving the Sun
The same technologies that will rid the electric grid of fossil fuels could also save it from potential disaster.
Why Diamond Light is Beautiful
Much of a diamond's brilliance and fire comes down to physics.