Astrobiologists recently cracked open a meteorite and found ribose, in addition to other sugars.
Ribose is the basic molecule of RNA, which in turn is the basis of life as we know it.
So, the molecular basis of RNA/DNA is floating around in the universe, possibly for billions of years. That could mean that Earth life came from other planets, or it could mean that ribose forms naturally all over the place.
If RNA forms elsewhere in the universe, then life elsewhere might not be so different from life here. …yes, more questions than answers. Still thought-provoking.