1.   Even the most mundane materials could have value.

2.   Some materials have the animals in them to begin with.

3.   The evidence for glass bead production at Ribe is comprehensive, and the material has yet to be published in full.

4.   The genetic material has to divide exactly.

5.   The makers Schott claim that this porous glass material has exactly the right combination of aerobic and anaerobic opportunities for bacterial growth.

6.   Where these materials have to be cleaned methylene chloride is the only chemical option once items are soiled.

7.   The material has a silky feel.

8.   Materials have to be prepared.

9.   Material has to be made into data and this involves a structure of inference that directs the material to research problems.