It occurred to me that the odds of all the factors needed to sustain life on earth and for that life to evolve into creatures self-conscious enough to consider their own origins are so long, that it almost couldn't possibly be a random combination. The way I see it, there are two possibilities. Either some being put this thing in motion for some reason OR there have been opportunities numerous enough to make such an astronomical probability into reality.
Consider a few of these factors:
Location: The Earth is exactly close enough to the sun to allow the existence of liquid water, which is of course vital to life. We can live here neither scorched nor frozen.
Composition: The early molten Earth stratified in such a way that it now has a nickel-iron alloy core. This core generates the electro-magnetic field that protects us from the million mph solar winds, which unchecked would blast our atmosphere into space and leave us naked to the vacuum.
Moon: Our perfectly sized moon (a size ratio unique in the solar system) stabilizes the Earth's rotation and gives us our tides and calendars.
So now we have the platform for life. A stable planet, in just the right orbit of the sun, protected by a nice cosy magnetic field. After cooling from it's molten origins, however, it was likely a sterile rock. But as luck would have it, there are huge chunks of ice hurtling through space all around us. A few of these comets probably smashed into the barren early earth, seeding it with both liquid water (just the right amount) and the carbon structures that would eventually become life.
Without even delving into the improbable causal chain that leads from the primordial ooze to Stephen Hawking and Miles Davis, this sequence of events seems just too perfect to be random. If it is random, it's like the proverbial infinite monkeys hammering away at infinite typewriters, and writing Shakespeare. But where do we get infinite monkeys in a finite universe? We would need infinite parallel universes and infinite alternate realities in which less fortunate earths are frozen, or baked baked or barren or smashed to atoms or moonless, or just simply fuel for a greater sun.
In any case I figure these to be our options: Earth was either set in motion by the hand of god, or it's the jackpot on a googolplex to one shot.