In light of the results of a recent experiment, it may be more accurate to re-cast the question as, 'We know what the 5 forces are today, at which points during the early stages of the purported big bang did these forces come into play? How did they get their characteristics and what effect would those purportedly incredible temperatures have in making them what they are?'<br /><br />I say five forces because solid experimental evidence exists for a "gravitomagnetic" force. The work, announced about a year ago by Tajmar and de Matos, showed that a previously unobserved force similar to the electromagnetic force has been produced in the laboratory. A radially accelerated superconducting disc (niobium or lead) consistently produced a measurable gravitational force tangental to, and in the plane of, the disc. The force reversed itself when the disc was spun in the opposite direction. Many dozens of data collection runs were made and the data were analyzed for 2+ years before being released.<br /><br />So, where does a gravitomagnetic force fit into the purported big bang, along with those other forces? Can the big bang survive having another force to account for, in addition to explaining the very peculiar non-Gaussian anomolies which have been discovered in its Cosmic Microwave Background?