Why do we have headaches and migraines?

     Headaches are probably the number one most frustrating illness there is. I myself have spent countless hours with doctors and specialist, not to mention thousands of dollars. I have been scanned head to toe and yet when I ask the one question that everyone ask's, I get a blank look like deer in the headlights.

 So what is the one question that doctors can never answer? What is causing the headache and how can I cure it? What I usually get is," We really don't know, but we can try this or that." Like I or anyone else want to be guinea pigs for their pharmaceutical. Are they afraid that if they told me the cause, that I might go out and find my own cure?

Is there such a thing as an overweight astronaut?

Is there such a thing as an overweight astronaut?

If you're overweight on earth, and then you moved to the space station are you still overweight? 

Is it possible that like many things it depends on where you are observing the question from?

If you are in space and you are weightless does obesity still matter?

Will only skinny people be allowed in space?