A scientist, let’s call him Smalbert Smeinstein, put forth the hypothesis that the universe is not expanding from the Big Bang, but rather space and time convert back and forth in an endless cycle. Also proposed is that mass and length can be converted back and forth. The conversion factors, in case you are wondering, are the speed of light and the gravitational constant.
As dictated by the scientific method, there is more to test and there are a variety of issues with hypothesis (e.g. the speed of light not being constant), none the less, it is an interesting notion. On an unrelated note, $20 says Creationists will use this to suggest there is no Big Bang which created the universe. On a semi-related note, the Big Bang theme song by the Bare Naked Ladies.