Many of us have some baggage when it comes to our health. A bad back. High blood pressure. Heart disease. Cancer. In health insurance speak: "pre-existing conditions." Those two words keep coming up in the heated political tug of war over healthcare. How did this become such a huge issue? On this episode we look at things from the past that are shaping our present, and not just in healthcare. We'll talk about cities built on shaky ground, a forest of old trees that's causing quarrels among neighbors, and we'll discover an intruder in a basement crawl space.