By all counts, math, physics, biology, chemistry, there can't be life anywhere.
Life develops not so easily... The requirements are pretty strict. Lets go over them.
The Star: We need to have a star that is very stable, no binary stars, no pulsars, No dwarfs, no giants, just a star that gives out a very steady amount of energy. The wrong star could me by the time we are in a stable orbit, we are too cold, or too hot, or flooded with nasty radiation that could stop life all together. A "common yellow" does the trick, but one as stable as ours isn't as common as the implies
Next we need to work on the layout of the solar system. We need a planet in the right spot, in the Eden/Goldilocks zone. After that we need a moon around that planet to help with tectonic shift, and tidal affects (to encourage life). The moon has to be the right size to aid life, not to cause massive land/sea waves. Then we need a secondary gravity well, say.... Jupiter. This helps pull all the rogue asteroids into a nice belt away from our planet (we don't want the planet pelted non stop!)
Next we need to look at the make-up our of our planet. We need lots of carbon (or silicon), oxygen, liquid water, nitrogen (and I'm cutting the list short here) in abundance on the planet. we need the right amounts and we need land (even for sea life), sea and an atmosphere. We need a planet with an Iron core (or other magnetic substance) to create a magnetic shield to protect us from the sun. We need a the right rotation on the planet, If our days were as long as Venus' we'd be dead... Too fast doesn't work too.
Just getting the environment set up. We have eliminated vast majority of the planets out there.
Then we get into the improbability of life forming... That by itself is a mystery we have no clue on how it happened. "lightning stuck the mud" doesn't cut it in my book, and about as creditable as an alien playing SimEarth made life. It's a huge "Then the magic happens" moment...
Now before somebody says "Well the Universe is infinite"... No it is not. Somewhere out there is the Big Bang Event Horizon, outside of which nothing exists. the father out we go from the universe center (where the "bang" happened) the less complex elements we find, to the point where we don't find anything more complex than hydrogen.
So... Life cannot happen. If you run into something that looks like a life form, just know you are likely imagining it.
Book to read: Rare Earth: Why Complex Life Is Uncommon in the Universe.
