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Chumbak Mani, Ancient Land Mine Detector used for Demining
Chumbak Mani, described in Brihad Vaimanika Sastra by Maharshi Bhardwaja around 4000 BCE, was ancient land mine detector, which emits electrical signals to find hidden arsenal inside ground, while flying or moving above. Bharadwaj, was father of Garga and Drona …