According to a growing number of scientists cosmology is at the end of an era. This era started 100 years ago with the publication of Albert Einstein's special theory of relativity and came at its height in the 1920s when the theory of relativity was used to develop the big bang model. However, at this moment there is a crisis within cosmology. More and more scientists openly doubt the big bang. There are alternatives for the theory of relativity as well as for the big bang model, but so far most scientists are scared to pass over Einstein.