In two posts on his blog, Alex Hutchinson takes a look at aerobic and resistance exercise and their effects on brain health (not to be confused with mental health). It seems as though getting the heart pumping does well for the brain, though resistance training and its complexities may benefit the brain more than aerobic exercise. There's still much more to learn, though.
A look at bridge materials and their effect on road noise for pedestrian paths along major highways. Really cool.
There are a number of other good reasons, but I think we can all agree that having a lot of miles logged when it’s time to start focusing on speed is a good thing.