From its roots as an electric version of snake oil, by the 1930s vibrators were just another household electric appliance that could soothe your pains at the end of a long day.
Vibration devices have been used to treat everything from ‘hysteria’ to hair loss. So Marie Kondo’s tuning forks and crystals are nothing new.
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A resonance theory of consciousness suggests that the way all matter vibrates, and the tendency for those vibrations to sync up, might be a way to answer the so-called ‘hard problem’ of consciousness.