These tricks are more than family lore, however. They originated in the early 20th century thanks to research on ...

They originated in the early twentieth century thanks to research on high-altitude baking done by Inga Allison, then a professor at Colorado State University. It was Allison’s scientific prowess and ...

She sought other ways to conduct high-altitude experiments and traveled across Colorado where she worked ... 11,797 feet in a shelter house on Fall River Road near Estes Park.

Inga Allison tested her high-altitude baking recipes at 11,797 feet at the shelter house on Fall River Road, near Estes Park, Colorado. Archives and Special Collections, Colorado State University ...

Photos of the French Alps, Utah, the Maldives, Quebec, Australia and Argentina show the naturally occurring letters.