Short answers, pulled from the story.
James Caleb Jackson invented the first cold breakfast cereal, called Granula, in 1863 at a facility called Our Home on the Hillside in Dansville, New York. The cereal never became widely popular because it required soaking overnight before it was soft enough to eat.
Battle Creek, Michigan, was both the center of the Seventh-day Adventist Church and the birthplace of the modern ready-to-eat cereal industry. John Harvey Kellogg launched Cornflakes there in 1895, and Charles W. Post developed Grape-Nuts nearby, earning the city its unofficial title of Cereal Capital of the World.
Ferdinand Schumacher adopted the Quaker symbol in 1877, making it the first registered trademark for a breakfast cereal. By 1900, the Quaker Oats brand had reached annual sales of $10 million.
Kellogg's Sugar Smacks, created in 1953, contained 56 percent sugar by weight. It was part of a postwar wave of cereals reformulated to appeal to children.
A January 2025 study in the American Journal of Preventive Medicine analyzed cereal purchases from 77,000 American households over nine years alongside Nielsen advertising data. It found that ads targeting children strongly correlated with increased purchases of sugary cereals in households with kids, while ads aimed at adults had negligible impact.
Over 2016 to 2017, Americans purchased 3.1 billion boxes of cereal in a market valued at $9.8 billion. Cold cereals made up 88 percent of purchases, and Kellogg's and General Mills each held 30 percent of the cold cereal market share.