Wow, that's pretty incredible. The truth is even if you look at just the sperm bit, the chances are something like 1 in 10,000,000,000. Amazingly true how unlikely it is that all the people on Earth right now, are actually alive on earth. The odds of going to class with that group of people, of buying your munchies or beer from that nice person behind the counter, or that you don't get hit by a vehicle today in the case of city slickers are so astronomical and yet most people don't even think about it. Including myself until I seen this video. We're all outstandingly lucky JUST to be alive, but precious few are thankful for it.
I think I'm getting too deep into this, but this is a deep and informative flash. Anyways, easy 5/5, well done.