http://www.jcrows.com/bang.htmlUPDATE: PROOF THE BIG BANG DID NOT HAPPEN
Perhaps the biggest contradiction with the Big Bang Theory is the question of the singularity. The "primordial egg" had to be a super-massive black hole. Therefore no amount of "bang", no matter how big, is going to thrust the universe out into, well, the universe.
Cosmologists eager to promote the Big Bang Theory have hit upon the "explanation" that the laws of physics, gravity., etc. simply did not apply in those first few moments of the universe. The present Cosmology theory is that the universe enjoyed a period of "rulelessness" of about 3 seconds, after which the elements formed and the fundamental forces of the universe, gravity included, were functioning as we see them today.
Ah, but there is a problem. The singularity formed by the primordial egg turns out to be rather large.
Estimates of the total mass of the universe vary wildly, given that the ends of the universe have not yet been determined. One estimate is found at
http://www.rostra.dk/louis/quant_11.html of 2.6*1060.
From the mass, you can calculate the diameter of the event horizon by finding the distance from a point mass that will have an escape velocity of c. Use sqrt(2GM/r) where M is the mass of the hole (the entire universe in this case) and r is the radius (classical), and G is the gravitational constant. Work it backward starting at c and you get c^2=2GM/r.
This works out to an event horizon light years across!
In short, at the moment in time when the Big Bang theorists claim the universe was functioning as it does today, complete with all fundamental forces, the entirety of the universe' mass was still well within the event horizon of its own gravity well. That the well was not the product of a true singularity is irrelevent, Newton's equation provides an equivilent gravity field for a singularity or a super dense mass in a localized region.
Therefore the Big Bang, as currently described, could not have produced the universe as we see it today. At three seconds, the time the theorists claim the universe started operating as we know it, it would have come under the influence of its own gravity and unable to reach an escape velocity exceeding that of light, collapsed back into itself.