I thoroughly enjoy the Last Word feature of New Scientist where the readers pose and answer questions amongst themselves. The questions are hilarious sometimes and always informative. Case in point: The question about the awful smell of human droppings.
Another question asked and yet unanswered is this. I am paraphrasing here. “If I try to calculate the number of my ancestors starting with my parents, the numbers don’t add up. [My parents + their parents + their parents + .. ] is: [2 + 4 + 16 + … and so on]. If I continue adding, very soon – within a few generations – I end up with an insanely large number of ancestors. I couldn’t have possibly had so many ancestors. Heck, there never existed so many people to satisfy my ancestoral math. What’s wrong with this calculation?” (Some of you may have read a similar question in one of Dawkins books. I remember reading this but forgot which book it was).