Every day you make countless contacts with the physical world. The town where you live, the water you drink, the air you breathe, the buildings where you work, the roads you travel, the parks where your children play, the schools where they learn. While most of these everyday encounters are taken for granted, some serious thinking has gone into making each of these better than it used to be. And there's a good chance we had our heads in it. Always using our minds. Always thinking ahead.