Here is something I find interesting, from a philosophical point of view:
Living things are so drastically different from non-living things.
Actually, I don’t think they are. I think this is the point: Living things are composed of the same kinds of chemical elements as non-living things; carbon, iron, hydrogen, oxygen, calcium, phosphorous, etc. These materials are not only common on earth, but they seem to be common in the universe, at least, the parts of it that we can see. So are simple molecules like hydrogen, water, ammonia and methane. Common processes, like lightning or ultraviolet irradation can catalyse chemical reactions which assemble these simple molecules into more complex ones, including things like proteins and nucleic acids, which are the precursors of living matter.
It could be different; it could be that living things contain some special element - “vitalium”, say, which is
never found in non-living matter and is present
nowhere else in the universe. It be that simple molecules just don’t assemble themselves into more complex ones. Both of these observations would lend powerful support to the view that life beyond the earth is not just unlikely, but actually impossible.
But that doesn’t seem to be the way things actually are.
You look anywhere in the known universe, and there is absolutely no life. It is empty and void of any life.
I guess life sticks out like a sore thumb in this empty universe on our little blue planet.
So, indeed, the question is, where is everybody? I guess there’s a lot of stuff that we don’t know about the origin of life on earth. But we’re working on it…
