The Mapmaker's Ghost

In 1928, Alexander Fleming came back from vacation to find a ruined petri dish — and almost threw it away. What stopped him, and what he saw in that contaminated culture, would eventually save an estimated 200 million lives, but the path from a cluttered London lab bench to a working antibiotic ...

In the 1920s, Henrietta Swan Leavitt was hired to measure stars — not study them. But buried inside her meticulous data was a mathematical relationship so powerful it would shatter humanity's understanding of the size of the cosmos and hand Edwin Hubble the ruler he needed to discover that the u ...

In 1908, a woman with no formal physics degree was cataloguing stars in a Harvard basement when she noticed something that would shatter our understanding of how big the universe actually is — and then watched a man take credit for it. This episode traces how Henrietta Swan Leavitt's discovery o ...

In 1952, a chemist named Rosalind Franklin aimed an X-ray beam at a fiber of DNA and captured an image that would quietly rewrite biology — without her permission, without her knowledge, and ultimately without her name on the prize. This episode reconstructs the four-way race to decode the doubl ...