steel

Afraid of heights? This is not the job for you.

The iconic St. Louis Gateway Arch, an engineering wonder that towers high above the skyline, is now 50 years old. Discoloration on the stainless steel exterior has building doctors climbing 630 feet up the arch to examine the mysterious stains.

Graphene, a one-atom thick layer of carbon

Graphene is a one-atom thick layer of carbon that is 200 times stronger than steel and thinner than a sheet of paper. The Financial Times reports on this element.  Will it change the world?