It's remarkable what people can do nowadays. The company co-founded by Tom McGrath converts glass bottles into lightweight construction aggregate. This stuff starts out as curbside recycling, your emptied beers and so on, and ends up supporting you as you drive over a bridge. But then there's nothing like raising and racing Thoroughbreds to show the latent capacities lurking in refuse material. Because Vequist (Nyquist), the champion juvenile filly homebred by McGrath's Swilcan Stable, was rejected in the ring twice over. The first time, she was in utero when her...