For decades, the majority of functioning lighthouses have operated mechanically, without a resident lighthouse keeper to keep things going. Yet tourists still flock to sites like Split Rock to ponder the lighthouse keeper’s lifestyle. What is it about a lighthouse that keeps us wondering?

The Mayo Clinic treats more than half a million people each year in Rochester, Minnesota, and in facilities in Florida and Arizona. MN90 producer Marisa Helms reports that the Mayo family philosophy of team-based patient care was established early on, and continues to be a hallmark of the world-famous hospital.

The Stone Arch Bridge is an iconic part of the Minneapolis landscape. But it hasn't always been just for looks and bicyclists and pedestrians. MN90 Producer Andi McDaniel discovers the hard-working past of this famous Minneapolis landmark. Includes an interview with David Stevens of Mill City Museum.

In the late nineteenth century, Maria Louise Sanford was a star of the regional lecture circuit and one of the most charismatic professors at the University of Minnesota. She was also one of the only female professors—and some of her colleagues had it out for her. Britt Aamodt reports in this MN90 segment.