"For the given density, our material is the strongest known," according to Seok-Woo Lee of the University of Connecticut, who partnered with colleagues from Columbia University and Brookhaven National Lab.

"I am a big fan of Iron Man movies," mused nanomaterials scientist Oleg Gang. "I have always wondered how to create a better armor for Iron Man. It must be very light for him to fly faster. It must be very strong to protect him from enemies' attacks.

"Our new material is five times lighter but four times stronger than steel."

Some metals, such as titanium, are stronger and lighter than iron. Certain alloys are even stronger—allowing for lightweight body armor, better medical devices, and safer, faster cars and airplanes. Metallurgical techniques have reached a limit in recent years, until nano materials unleashed creative opportunities.

The colleagues reported in Cell Reports Physical Science that by building a structure out of DNA and then coating it with glass, they have created a very strong material with very low density. Glass might seem a surprising choice, as it shatters easily. However, glass usually shatters because of a flaw – such as a crack, scratch, or missing atoms – in its structure. A flawless cubic centimeter of glass can withstand 10 tons of pressure, more than three times the pressure that imploded the Oceangate Titan submersible near the Titanic this summer.