'The Poisonous Goblin That Became the World's Most Precious Metal'

Medieval miners called it the poisonous goblin — a cursed ore that released toxic fumes and ruined their silver. But this "worthless" rock was hiding a secret: cobalt, the brilliant blue element that colored ancient glass, powered the industrial age, and today runs the batteries inside your phone, your laptop, and electric cars. In this documentary, we trace cobalt's wild journey from a feared mine demon to the most fought-over metal on Earth — and the dark human cost behind the Congo mines that supply it. Subscribe for more untold science and history documentaries. #Cobalt #Documentary #RareElements #UntoldHistory #ScienceDocumentary #BatteryMetals