[Superman]

The "math" would seem to suggest that there has to be life out there.

On the other hand, we don't know how odd it is for life to exist on a planet over the long time frames it has existed on Earth, and we don't know how likely it is for that planet's geology, weather and astronomical benevolence to allow life to evolve to the level we have. For instance, we've got a moon in orbit around us and two HUGE planets just outside our orbit which, together, sweep the cosmic debris that would otherwise regularly decimate our planet. While life is quite possible and may spring up often on planets, something tells me that hundreds of millions of years of relative environmental tranquility may be exceedingly rare.

Then, getting back to the math, I don't think science has really ever felt like it had a good explanation for how life would spontaneously occur. All life on Earth has DNA. The simplest DNA we can identify still makes a wrist chronograph look like a lump of mud by comparison.

Hmmmmmm.......