The video explores the assassination of Georgi Markov using ricin and delves into various natural poisons, including botulinum toxin, cyanide, ricin, strychnine, and amatoxins. It discusses their sources, effects, and lethality, highlighting the complexity of measuring poison potency and the development of antidotes. The video also touches on the potential use of these toxins in medical treatments, such as cancer therapy.

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