Originally Posted by
springs
Most grains and many fruits (especially bananas) have been altered by cultivation by humans for thousands of years and are very different than the wild versions that existed prior to the development of agriculture. In this sense these foods have been artificially evolved during this time explicitly for the benefit of humans. The same is true for domesticated animals bred for food. This is one of the problems with the Paleo concept (it does have some good points IMO). Foods (plants and animals) commonly available for purchase today are very unlike those eaten 20,000 years ago.
+1 good post...One of the popular foods which has been altered by humans are the Almonds...Wild almonds are extremely toxic and will kill a person. Sometimes a mutation will occur in nature which will produce an almond which is not poisonous. Ancient humans somehow learned to exploit those and eventually cultivate and breed them into edible non-toxic almonds.