Milly Zantow pioneered the plastics recycling movement and invented the numbered-triangle system used for identifying different kinds of plastic.
Frances Hamerstrom, an ornithologist who helped save the prairie chicken population in Wisconsin, was the first woman in the U.S. to earn a master’s degree in wildlife management.
Laurel Clark was an accomplished doctor, U.S. Navy captain, and NASA astronaut who died aboard the space shuttle Columbia in 2003.
Ruth Bleier was a neurophysiology professor whose pioneering work showed that there was gender bias in the field of biological science.
Before Ineva Reilly Baldwin championed the “Wisconsin Idea,” she was a U.S. Coast Guard lieutenant commander during World War II—the highest rank ever attained by a woman at that time.