I don't see it mentioned on wikipedia, but one tin-pot theory I heard once and quite liked was:
* The universe at the moment is on average large, cold and quite hostile to life.
* At some point in the past all the energy in the universe was concentrated roughly at one point
* So, in between, the universe was a soup of energy that would have been, on average, warm, comfortable and conducive to life.
It dovetails with this because it is a plausible "why would life have evolved somewhere else but not here" counterargument. I wouldn't buy it though, it seems likely to me that earth's life is a local phenomenon.
* The universe at the moment is on average large, cold and quite hostile to life.
* At some point in the past all the energy in the universe was concentrated roughly at one point
* So, in between, the universe was a soup of energy that would have been, on average, warm, comfortable and conducive to life.
It dovetails with this because it is a plausible "why would life have evolved somewhere else but not here" counterargument. I wouldn't buy it though, it seems likely to me that earth's life is a local phenomenon.