I realized that my sixth sense was failing when I stopped noticing the magnetic fields of my laptop. In fall 2012, I implanted a rare earth magnet in my right ring finger. Magnets were one of the most accessible forms of DIY biohacking, a niche subculture riding the start of a massive mainstream publicity wave. My colleague Ben Popper got one while writing a biohacking feature, and it sounded like magic. When I first got it, I wasn't disappointed.

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