Evolutionary history of what mammals eat

animals have adapted over the years by changing their diets, but it wast as easy as you think. animals couldn't go from eating a ripe peach to a slimy bug over night. these changes took years and years to happen. back in the cave man days omnivores ( animals that eat both meat and plants) didn't even exist, animals either ate meat or plants. it was hard for them to change into eating both because a carnivores sharp teeth weren't meant for chewing bark, or eating roots. An herbivore's flat molars couldn't tear through flesh like the carnivore's could. and their digestive systems were completely different. it took thousands of years before a new species could handle both of these very different foods.

I thought this article was very informative. i didn't realize herbivores and carnivores were so different. 

this has a slight impact on the world. if omnivores never existed things could have been completely different,  we might all be vegans!