Get Off Your High House
Einstein's Dreams by Alan Lightman
I don't know if you're a fan of science fiction (or science in general). I am, but then again, I own a Star Wars belt. You don't really have to love sci-fi to really enjoy this book, since it is really more about thinking than testing laws of physics and whatnot.
Actually, I haven't finished the book yet. Immediately after soaking up the chapter that inspired this booksketch, I broke out the inks. Einstein's Dreams is a delightful collection of short chapters where the author kind of just bounces these neat ideas off of you. What if time in our universe was just one big loop, and we'll forever repeat our joys and sorrows? What if there were two sorts of "time?" What if there was a city that worshipped the flow of time?
One chapter mentioned how scientists measured that time actually is ever-so-slightly slower at high elevations, and quicker nearer the Earth's core. The author poked my brain when he suggested that in an alternate universe, people took this idea and ran with it (or climbed, rather). They began to migrate to the mountains and build their houses on tall stilts as to prolong their lives. Height becomes a status symbol. People hate lowering themselves to the Earth's surface to run errands. So when they have to do that, they really RUN errands. As fast as they can.
Height matters, I guess!