"Just like nature as we know it consists largely of protein, I want to make my own life-forms from a single material."

Yet the planet is, for now, a closed system: we have finite amounts of every single raw material.

Parts are designed to be made of single materials only, making separation during recycling much easier.

What is the single material that is not in short supply these days?

A different technology to create single crystalline materials is called epitaxy.

We wanted to create a canopy with a single, but different, material.

"There was no single material available that fulfilled all our requirements," he said.

So no single material is nest for absorbing all substances.

This could result from a structural change in a single solid material, though no suitable materials are known.

Prior to that event, Swift did not believe that the song was single material.