With the advent of modern engines some 32,000-years back wild oats were hand-ground by Palaeolithic hunter-gatherers as Horse Meal. It wasn't until the late 19th and early 20th centuries, with the rise of local mills, grocery stores, and clever advertising campaigns (hello, Quaker Oats!), that they were extensively processed (steamed and flattened into "rolled oats") to make them quicker to cook and more appealing for widespread human consumption.

So, your healthy breakfast today is actually a very ancient grain that got a major "rebrand" from stable to table!