The most recent xkcd: The business about eventually being either "an ancestor to all living humans, or none of them" might have been brought to mind by Adam Rutherford, "So you're related to Charlemagne? You and every other living European…", The Guardian, 5/24/2015. But it's true, and as discussed in "Being descended from Confucius", 2/9/2012, the … Continue reading Ancestors