Dr Julia Ravey and Dr Ella Hubber are both scientists, but it turns out there’s a lot they don’t know about the women that came before them. In Unstoppable, Julia and Ella tell each other the hidden, world-shaping stories of the scientists, engineers and innovators that they wish they’d known about when they were starting out in science. This week, the story of a young PhD student whose discovery of a previously unknown object in the universe won a Nobel Prize...but not for her.

On a cold night in 1967, Jocelyn Bell Burnell sits alone in an observatory, reading the data from a radio telescope. As the pattern in the data suddenly changes, she realises she has discovered an entirely new kind of cosmic phenomenon. Uncover her life story, from getting snubbed for the Nobel Prize to paving our knowledge of distant and invisible aspects of the universe.

Presenters: Ella Hubber and Julia Ravey Guest Speaker: Professor Dame Jocelyn Bell Burnell Producers: Ella Hubber and Julia Ravey Assistant Producers: Sophie Ormiston, Anna Charalambou and Josie Hardy Sound Designer: Ella Roberts Production Coordinator: Ishmael Soriano Editor: Holly Squire

(Image: Jocelyn Bell Burnell attends the 2019 Breakthrough Prize at NASA Ames Research Center on November 4, 2018 in Mountain View, California. Credit: Kimberly White/Getty Images for Breakthrough Prize)

Session 259: Brainwashing Secrets and Pain Relief through Hypnosis