Polonium
Supplement
A radioactive element used in the 'Urchin' neutron initiator. Its alpha particles trigger the release of neutrons from beryllium.
Mentioned in 2 videos
Videos Mentioning Polonium

The Man Who Gave us the Power To Destroy Ourselves (Oppenheimer)
Veritasium
A radioactive element used in the 'Urchin' neutron initiator. Its alpha particles trigger the release of neutrons from beryllium.

Fiona Hill: Vladimir Putin and Donald Trump | Lex Fridman Podcast #335
Lex Fridman
A radioactive element used as a poison, mentioned as an instrument Putin has presided over using.