It seems like one of the most exciting areas of scientific research because we have a lot of hypotheses, but there is a whole lot we don't know about...
Yes. And even today the organelle in our cells that supplies us with energy and which has its own DNA, the mitochondria, is the result of a eukaryote...
One idea is that two billion years ago a bacteria cell enveloped and encased an archaea cell, and the relationship somehow became symbiotic, with the...