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NASA has done a lot for human civilization over the past 50 years or so. It has introduced us to a wide variety of materials, and taught our scientists some incredible things about the world we live, and the vast expanses beyond this world. However, they do face some difficulty in defending themselves, due to the anonymity and sometimes obscurity of the discoveries they make, along with their unpredictability. This is why they have recently found their funding reduced.
Needless to say, NASA conducts a lot of research in collaboration with scientists all over the world. We know more about our sky and the universe surrounding us than we ever have before. However, much of this knowledge is esoteric and known only to a few people. NASA has never been especially good at tooting its own horn over the discoveries it makes. Without much press coverage, it can be very challenging to launch an effective sales pitch, which in turn leads to lessened funding for their endeavors.
Simply put, NASA lacks a sales person who can put drama, heroism and immediacy into the work the organization does. If they had such an individual, it might be easier to keep their funding increasing and the public clamoring for more missions and more knowledge. Unfortunately, most people are so stuck on Earth, the notion of being able to learn anything of any use from space travel seems absurd. For a lot of people, teflon and its ilk just are not that important. However, the very nature of discovery means that through denying NASA, we could all be denying ourselves some really wonderful things.
