Stefanie: "Obviously 1 % difference in genetics between Chimps and humans can lead to a lot of differences. I don't think anyone will make a mistake in trying to distinguish a human from a Chimp." Francois: "Does it lead to a 2.5 ratio of stomach capacity and length of small intestine?" For sure it could. In my opinion looking at the percentage of DNA we have in common with other species is pretty useless. Francois: "Of course selective pressures would be low if the new food doesn't affect LRS, but there'll be some anyway." Stefanie: "No, there won't be any if LRS is not affected." Francois: "I'm not sure of that. The survival of experienced elders can be vital to the group." If it is vital to the group it will affect LRS so then there is a selective pressure leading to evolution. This is just a proper interpretation of the theory of evolution. That evolution happens is observable all around us and has been proven many times. We also know very well how natural selection works (at least some people). If you believe it or not is another story (and hopefully one that is not going to be discussed here). Francois: "But why draw a line between vertebrates and invertebrates?" Simply because the only distinguishing food group between carnivores/ omnivores and herbivores is the eating of vertebrate meat (omnivores is not really a category, because they don't have any distinctive charactersistics). So if we want to know if humans should be considered carnivores/ omnivores or herbivores, that is the food group to look at. Jean-Claude: "Are eggs vertebrate or not." Of course eggs can become vertebrates. Point here is if a food can be easily obtained by as well carnivores/ omnivores as herbivores. Eggs can in theory easily be obtained by herbivores, so that is why they cannot be excluded as a possibility in their diet. Vertebrate meat is the only food group that cannot be obtained by herbivores. Francois: "See that (our teeth) are finely adapted to the job (of eating vertebrate meat)." That we can do something doesn't necessarily mean that we are adapted to it. In my opinion, if humans do something that is not done by comparable animals for the characteristic under study, they are playing a dangerous game (sometimes referred to as "Playing God"). _____________________________________________________________ Learn about the power of raw foods at ---> http://www.rawfoods.com