Here's the quote of the day from Steven Novella.
I have noticed, however, that researchers have become reflexively good at making up plausible-sounding possible applications for their basic science research – as if they have to constantly justify their research. Every basic-science study that looks at viruses, therefore, may one day cure the common cold. Anything dealing with cell replication may be a cure for cancer. Any materials advance will lead to supercomputers or superlight vehicles. All brain research, apparently, might one day cure Alzheimer’s disease.
I would love for a scientist to say something to the effect of “I have no idea what, if any, practical use this research might lead to, but the knowledge is really cool”. I guess you just don’t say that to a grant committee, however.