Everyone gawks over the Internet, black holes, and parallel universes, but what are some bizarre scientific phenomena that are really taken for granted? Case in point, the airplane. It’s a gigantic piece of metal, several tons in weight, that is generally found floating above major metropolitan areas. And yet it was invented over 100 years ago by two bicycle salesmen who dropped out of high school. The only reason people take it for granted, as they do, is because all but a handful of people throughout the entire world were born after airplanes became omnipresent. The invention of the airplane long before that of ghost paper is the most concrete proof to me that scientific and technological progress is anything but linear.