On a summer morning in 1945, a device known simply as 'Gadget' was detonated. An enormous explosion tore a crater into the New Mexico desert, melting sand into radioactive green glass and sending a mushroom cloud 7.5 miles into the sky. This was the first controlled detonation of a nuclear weapon, and its mastermind was the American theoretical physicist, J Robert Oppenheimer.

In this episode, Dan is joined by writer and artist Ben Platts-Mills to hear about the man who orchestrated one of the most extraordinary scientific developments in human history. What kind of person was he? How did he go from a shy, studious child to a charismatic celebrity scientist? And what did he think about the perils of the weapons he worked so hard to create?

Produced by James Hickmann and edited by Dougal Patmore.

Discover the past on History Hit with ad-free original podcasts and documentaries released weekly presented by world-renowned historians like Dan Snow, Suzannah Lipscomb, Lucy Worsley, Matt Lewis, Tristan Hughes and more. Get 50% off your first 3 months with code DANSNOW. Download the app or sign up here.

We'd love to hear from you! You can email the podcast at [email protected].

You can take part in our listener survey here.