I'm wrapping up a discrete math course for my university. The last chapter gave us an introduction to graph theory, and I want to learn more. The chapter in question introduced some basic concepts: ...

What do a tree and the Eiffel Tower have in common? According to a Duke University engineer, both are optimized for flow. In the case of trees, the flow is of water from the ground throughout the ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. Successional changes in plant communities were recognized and described well ...