Origin of the Universe - The Inflation Universe Theories
The Big Bang Theory provided an atheistic explanation for the origin of the universe, but its obvious simplicity was subject to multiple attacks. As a result, the original theory is no longer the dominant scientific explanation for the atheistic origin of the universe. While the original Big Bang Theory is now "dead," from its ashes have emerged the various Inflationary Universe Theories (IUTs). Starting with Alan Guth in the late 1990's (The Inflationary Universe: The Quest for a New Theory of Cosmic Origins), the scientific community has now proposed roughly 50 different IUT variants. Scientists hope that one of the current IUTs will sire an accurate reconstruction of the birth of our universe, though it is universally acknowledged that all of the current IUTs have their problems. It seems the only way to get realistic calculations to match an IUT model is to make assumptions that are poorly justified.