We are all made up of atoms at least that is what science tells us -- that we are all but just a combination of indivisible elements that we know in Chemistry.
Since Einstein's Theory of Relativity, physicists used to believe that the theory governs everything there is to know about the universe from the celestial to the terrestrial. Strangely though, Relativity doesn't figure at the subatomic level. In Quantum Mechanics, particles behave erratically that the laws of physics seem irrelevant. Accordingly, subatomic particles move freely defying gravity and space-time dimensions -- it is a totally a different reality down there!
In String Theory physicists posit that the universe may not be that three-dimensional reality we know and that there may be other dimensions that exist between or around us. There could even be eleven dimensions as forwarded by Edward Witten who according to physicists around the world is today's Albert Einstein who by the elegance of his mathematical prowess forwarded the M Theory - an offshoot to the String Theory.
String Theory posits that
"the electrons and quarks inside an atom are not 0-dimensional objects, but 1-dimensional strings. These strings can move and vibrate, giving the observed particles their flavor, charge, mass and spin."
String Theory is not your everyday theory that scientists come up with most of the time. The strength of the String Theory is acknowledged by world renown physicists and Nobel Prize awardees like Sheldon Glashow, Steven Weinberg and Abdus Salam as well as those working for Fermilabs and at CERNS.
The String Theory is well explained in the book The Elegant Universe by Brian Greene, Professor of Physics at Columbia University and was adapted into a three-hour documentary for Nova and also shown on British television and the Discovery Channel. I have the book and the video as well and I got hooked to it since I watched and read all about it. The video is available in youtube and the book can be ordered at ebay or amazon. Not sure if there's an ebook of this.
Anyways, if you're familiar with this String Theory, I would be happy to know about what you think.