Is this our daddy?
Ever heard of Luca? Me neither, but it means the Last Universal Common Ancestor, in this case a single-cell, bacterium-like organism thought to have lived on Earth four billion years ago,
There is a huge disagreement among scientists about whether this organism was a half-alive creature dependent on chemicals in its environment, or a more sophisticated organism because it could synthesize proteins. The debate is far from over, but it certainly is interesting.