Rocket scientist who founded the Jet Propulsion Laboratory and Aerojet, and who also became the leader of the California division of the Ordo Templi Orientis, a Thelemite religion originating in Germany. Parsons lived in a mansion in Pasadena with Aleister Crowley and L. Ron Hubbard, where they participated in sex magic rituals and occult rites.

Parsons moved to the mansion's coach house after having to sell the property. He died under suspicious circumstances in 1952, supposedly while conducting scientific experiments at home, though colleagues maintained it was highly unlikely he would have become fatally injured after using chemicals he'd worked with numerous times previously.

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