Jennifer Ouellette has a wonderful article on a new method to fight cancer, using knowledge that we gained from high energy/particle physics. In this case, one is using an imaging technique from a Cerenkov radiation.
This is just one more example of the benefits one obtain (and taken for granted) from so-called esoteric fields such as elementary particle/high energy physics. I've mentioned earlier about such benefits that many people are not aware of. This is in addition to the fact that basic knowledge is so valuable, even when we initially do not realize its potential benefits and application later on. And let's not forget that out of all of this is the advancement in accelerator physics that continues to produce numerous crucial benefits.