Why? Going back 10 generations (~250 years) you have 1024 (210) ancestors. Going back 20 generations (~500 years), you have 1,048,576 (220) ancestors. Going back 30 generations (~750 years), you have 1,073,741,824 (230) ancestors.
LOL, I forgot to mention, I don’t want to believe it and who cares. Hahaha