Geography

Kris Williams via flickr Creative Commons / https://flic.kr/p/hdFDUU

On today's show: 

Wikipedia

If you pass through the northern New Hampshire town of Stewartstown and Clarksville, you may notice signs informing you that you are standing on the 45th parallel, the halfway point between the North Pole and the equator.

Such signs appear in quite a few places along the 45th parallel, but some are farther north and some farther south than others.

The 45th parallel, in other words, is a fuzzy line, and in this week’s Granite Geek column for the Concord Monitor, David Brooks explains why the line is so difficult to nail down—and why so many people insist upon trying.