The strong and weak nuclear forces have very short range. If matter were not neutral, you would never notice gravity in its presence. Matter does not like staying separately charged. It will do all it can to recombine negative charges with positive charges. Do you realize you could take the electrons out of one cubic centimeter of the nose cone of the space shuttle? Because it's the attractive force of those negative and positive charges that overwhelm the strength of those rocket engines.
The pull of gravity (the force, not the movie) is irresistible as Neil deGrasse Tyson and Leighann Lord grapple with weighty fan questions about matter and the curvature of spacetime.
Read more and listen to the full episode at http://www.startalkradio.net/show/cosmic-queries-gravity/
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