While working at the Salk Institute in California, Ursula Bellugi discovered that sign language was made up of specific building blocks that were assembled following strict rules, much like in spoken language. Her subsequent discoveries about the complexities of sign language led both to linguistic breakthroughs and to changes in the way deaf people felt about signing. Bellugi demonstrated that sign language is as rich and complex as any spoken language. Her work deepened our understanding of what it means to communicate as humans.

Katharine “Kay” Way was a nuclear physicist who worked at multiple Manhattan Project sites. She was an expert in radioactive decay. But after the atomic bombs were dropped on Japan, she became increasingly concerned about the ethics of nuclear weapons. Dr. Way signed the Szilard Petition and worked to spread awareness of the moral responsibility surrounding atomic weaponry, including co-editing the influential One World or None: a Report to the Public on the Full Meaning of the Atomic Bomb, remaining an outspoken advocate for fairness and justice.

“Hoots and derision, which did not worry me at all,” Lilian Bland wrote, describing her visit to an airshow in Blackpool, England in 1909. She’d been telling everyone there that she intended to build and fly her own airplane. They were unimpressed. Lilian was undeterred. She built a DIY plane of bamboo, wood, and fabric, with a bicycle handlebar for steering and an engine she carried from England back to her home in Ireland. But would the Mayfly, as she called it, fly?

In the first of a new series we’re calling Lost Women of Science Conversations—and a fitting choice for Black History Month—we talk to Maria Smilios, author of a new book that tells the story of Black nurses who were lured from the Jim Crow South to work at a tuberculosis (TB) hospital called Sea View on Staten Island, N.Y. Facing unsanitary conditions and racial prejudice, these “Black Angels” cared for TB patients for decades before a cure that they helped develop was found. It’s a story of bravery and dedication that Smilios pieced together from oral histories and medical records because there were no archives that described these nurses’ work.

Sara Little Turnbull, an industrial designer known for her work in material science, discusses her role in designing the moldable bra cup that inspired the N95 mask, as well as her disputed contributions to its development. She also talks about her other innovative projects, such as clear glass cooktop development and storage systems.

The Australian physicist Ruby Payne-Scott helped lay the groundwork for a whole new kind of astronomy: radio astronomy. By scanning the skies for radio waves instead of the light waves we can see with our eyes, Ruby and her colleagues opened a window into the universe and transformed the way we explore it. But to keep her job as a woman working for the Australian government in the 1940s, Ruby had to keep a pretty big secret.

Sallie Pero Mead, a forgotten electrical engineer, played a crucial role in developing radar technology during World War II. By developing and testing hollow metal tubes as waveguides, her team discovered a new way for hyperfrequency waves to propagate, paving the way for radar technology. The podcast uncovers Sally's educational background and discusses the applications of radar technology today. The importance of collaboration and ongoing research into forgotten female scientists is also highlighted.

Scientist Leona Zacharias was a rare woman. She graduated from Barnard College in 1927 with a degree in biology, followed by a Ph.D. from Columbia University. But throughout her career she labored behind men with loftier titles who got the bulk of the credit. In the 1940s, when premature babies born with healthy eyes were going blind, Dr. Zacharias was part of the team that worked to root out the cause. In this best of Lost Women of Science episode, host Katie Hafner visits the archives at M.I.T. and The Massachusetts Eye and Ear Infirmary in Boston to try to understand Dr. Zacharias’s role in rooting out the cause. For host Katie Hafner, it's personal: Leona Zacharias was her grandmother.

Meet Vera Peters, a doctor who discovered a less invasive treatment for breast cancer patients that spared women from radical mastectomy surgery. Her groundbreaking research challenged traditional surgical practices and revolutionized breast cancer treatment. Peters' approach using lumpectomy and radiation therapy proved to be more effective than radical mastectomy, providing women with a less invasive and more accessible treatment option.

Annie Montague Alexander was an adventurer, amateur paleontologist, and the founding benefactor of two venerated research collections at UC Berkeley - the UC Museum of Paleontology and the Museum of Vertebrate Zoology. She was born in 1867, the daughter of a wealthy sugar baron, but she never quite fit in with her high society peers. Instead, Annie created for herself a grand life out of doors, away from the constraints of the era: she funded expeditions up and down the West Coast, hunting fossils. And sometimes she wore pants! But there was a catch. Annie always had to be accompanied by a female chaperone, as it was considered unseemly for a woman to travel surrounded only by men. Luckily, this worked out well for Annie: One of those female chaperones would become her life partner. For show notes and transcript, visit lostwomenofscience.org