Hmmm, not sure what you mean.
As in: "Does anyone have the capability to do science?
My answer to that is, with the proper education, anyone can learn to do science.
Not to say that science is easy. Indeed, I've been interested in the fields of Physics, Chemistry and Biology for a good number of years, and its taken a long time to learn it. And I have MUCH more to learn, an almost infinite amount.
I think that, as with anything, it takes hard work and dedication, and most importantly, love it!
Though the above ideas, I thin ktaht if you were to follow that, you would find science to be both a productive and enjoyable career/pastime, or otherwise.
Good luck to you!