Aviation has come a long way since the Wright Brothers in 1903. We get some sense of this when we look at older aircraft, but we seldom get the chance to make side-to-side comparisons. This picture, however, is a rare and perfect illustration of just how far aviation has come. What's more impressive is that it shows the progress of just one company - an aviation powerhouse that has been around nearly as long as manned flight itself.
This picture comes from an article at Wired.com and shows Boeing's oldest airliner, the Boeing Model 40 flying next to their newest airliner, the 787 Dreamliner.