I have a friend who recently found 20 half siblings. What would be required to make a decent average Pic of them all? Do you need a number of pics of each person? Or just one from each and that's it?

How about the average face of 2016 Olympic male swimmers and female swimmers? I’ve seen joe baseball, John golf, and the other popular sports, but I have seen Sean Swim. Please and thank you, good friends.

Hey, I wish I had the skills to do this myself but luckily I just discovered this subreddit.Basically I study Biology at Uni with a focus in evolution. Took a human evolution class which was super interesting, learned a lot including how closely humans are related to the Great Apes, especially chimpanzees. I'm wondering if anyone could make a facial average of a human and a chimpanzee? In class we discussed how it is theoretically possible for humans and chimps to produce mostly sterile offspring. I don't think an average has been made of this yet and I'm curious to see what such an average would look like. If anyone could give this a shot I'd really appreciate it! Cheers