Too little material may provide protection for a while, but need to be replaced regularly.

Too much material would provide protection at an unnecessary cost.

These materials provide mass, making the whip easier to crack during normal use.

Those materials provide fibers that make the patch stronger, he said.

The material could provide some of the most important evidence in a case that the authorities say has potentially serious national security implications.

Biological material can provide models for many industrial materials and structures.

But the material released today provided the first documentation of that.

Blending it with new ideas, materials and technology provides a natural way forward.

"This material certainly provides sufficient basis for indictment in a court of law."

The material, while never intended for commercial release, provides insight into Scott's work.