New answers tagged mammals
Suggested Reads: Evolutionary Psychology By Lance Workman, Will Reader Evolution of Human Behavior: Primate Models edited by Warren G. Kinzey Social Behaviour of Children: A Cross Cultural Assessment By Ralph E. S. Tanner
Until someone has a better method to determine this, and I'm willing to go with idea of that this question is not answerable, I put forward the two likely forms of selection criteria: Which mammal has the highest percentage of keratin in it's body for the highest density, and which has the highest percentage of gas (over the day) for the lowest. I also ...
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