We have spent many decades looking fr things such as "dark matter", "Dark energy" and other things that are basically fudge factors and violate known physics. Here are 21 questions about the Big bang that need to be answered. The first question is a religious question, so it is not included. http://creation.com/dark-matter-crisis-for-big-bang Spoiler : Yet the one thing we have searched for the most is dark matter an yet there has observation of dark matter. No sign of dark matter in underground experiment LUX, the most sensitive dark matter detector yet, fails to capture mysterious particles.