He also talks of "intellectual infrastructure," saying that you "push higher education" as an investment in "future generations of leaders."

These scientists and educators do more to provide the basic intellectual infrastructure of the nation than any other group.

Lack of intellectual infrastructure was a major hurdle.

But the intellectual infrastructure of a nation depends on the ability of its citizens to work comfortably with language and numbers.

Public policy can directly affect the funding of capital equipment, intellectual infrastructure for industrial research, by providing tax incentives to those organizations that fund research.

"Transformative change requires long-term investment in the nation's intellectual infrastructure," she wrote.

Mr. Tyson's work is not lacking in intellectual infrastructure; the pieces explore different scientific ideas, and the checklist comes with a five-page glossary.

It is not only our physical infrastructure that has decayed but our intellectual infrastructure.

Two priorities are essential: To preserve the city's physical infrastructure and to build on its intellectual infrastructure.

"They have been very successful and very positive contributor to the intellectual infrastructure of the area," he said.