[MUDDOG]

We can't even explain the origin of life on earth.

The problem with explaining the origin of life is, how did self-replicating molecules arise? DNA is very complex. Even the simplest life forms require some such complex molecules. But how could such complexity have arisen? There must have some intermediate forms, but we don't know what it was.

Once you get complex self-reproducing molecules, though, natural selection can do the rest in terms of making increasingly complex life forms.

Perhaps the intermediaries to get to DNA no longer exist. It would be like if we built sentient machines and then we died out. Later, the machines might wonder how they originated. The intermediate step, us, would be gone.

[MaxMax]

Inside each molecule there is something that makes it tick, and something inside that,
and something inside that, and on and on and on. The deeper we look for the end
the more we find and the longer we have to wait for technology to catch up
so that we can see more. And if we find the deepest hidden secret behind the exact center
of each molecule, there's something that makes it tick too. God.

[RoadGumby]

“In the beginning, God....”