Bread was around 30,000 years ago -study - Yahoo! News I know the historical/archeological evidence for paleo diets is not the main reason they're adopted by the majority of those who follow them. Does this study do anything to make anyone consider reconsidering a bread-free diet? I personally avoid grains because when doing so I feel my best and perform at my best athletically. Also, if nothing else this article is funny because it makes sure to point out that modern day adherents of paleo diets eat only lean meat, vegetables, and fruit. Only lean meat? I almost spit up some bacon grease when I read that.