Why is it that no matter how many experiments are conducted, no matter how much money is spent or government grants given, the only species that seems to benefit from experimentation on diseases is ...rats. I guess mice count too but lets be honest, as far as a species goes they're both in the running for least admired living creature so whats the dif? Never the less we are always hearing about some new breakthrough that is going to cure the world of diabetees, obesity, aids, or some other disease that none of us new existed in the first place. Then after they sucked us in to buying their paper for the article we get to the fine print..."Of course so far these results have only been observed in rats." First off doesnt it seem we are giving way too much power to rats? I mean if they are used because somehow their internal biological system is similar enough to humans that its worth exploring, then we have to count on the rats to be honest in their responses to the potential side affects of whatever drug is being used. Maybe rats are smarter than we realize and are simply faking horrific side affects simply to get back at us for all these years of experimenting on them and their kindred? All a rat has to do is wait for the latest miracle drug that will potentialy cure cancer to be injected in them...wait a couple seconds and then begin to walk into the side of the cage like they've suddenly gone blind. The scientists are downtrodden, meanwhile the rest of the rats are yucking it up watching "shecky" the rat do his latest bad reaction to new drugs routine. " OHH, I'm limping and periodically going into unpredictable and periodic somersaults followed by uncontrollable barking and knawing at my hind quarters" Big laugh for the rat family and back to the drawing board for the dejected scientist. Since so many promising results always seem to occur only in the rats yet it never transfers to humans, maybe the scientists are doing it all wrong? Perhaps more research money should be spent in learning how to alter human genes to become more "rat like"? That's another reason why I don't buy evolution. Apparently humans "evolved" the ability to use their minds to research how to better survive, but along the way un-evolved our rat like qualities that kept us from getting the disease in the first place! Sounds to me like "natures" a big fat screw-up.Then again what do I know, I'm just a comedian.