Morris said, Did Hammond ever ask for any physical materials from your site?

Users would be able to search for digital and physical materials at creativecommons.org.

Of these physical materials, carbon is the most important to the living forms.

The museum said the painting was authenticated by letters, style and the physical materials used.

Unlike physical materials and the traditions surrounding them, digital pixels have no inherent aesthetic or "feel".

Conducting the trade does not mean they will have problems, so long as they just hedge physical materials, the person said.

Our present existence is the organic correlation of that personal force with the physical materials of the body, and with other forces.

Museum experts said the painting was authenticated by Van Gogh's letters, the style and the physical materials used, and they had traced its history.

'Every time two surfaces come into contact there's potential for the exchange of physical materials.