Richard Dawkins entertained this idea in "The Blind Watchmaker," to illustrate why we humans don't see any evidence of life simpler than today's life which is based on DNA/RNA, which are such complex molecules that something must have preceded it, but is no longer around.
He envisions us building thinking computers, that replace us, and thousands of years in the future, there's no evidence left of us (the intermediate form leading to them), and they wonder where they came from.
Re the machines wondering where they came from:
It’s not so much that there’s no trace of us, but that the sentient machines are so different from the organic life that preceded them, that they can’t imagine what they developed from.
Just so with current life based on DNA/RNA — we can’t come up with what came before that.