evidence: Since Bluetooth-operated wireless earbuds came into existence, internet users have claimed that they can "fry" or "cook" our brains — in other words, that they can cause brain cancer: [...] Rumors that wireless devices can "cook" or "fry" one's brain appeared in 2015, when a group of more than 200 researchers signed an appeal to protect humans against "non-ionizing electromagnetic fields" (EMF). Their open letter mentioned, without citing, "numerous recent scientific publications" that allegedly suggested EMF might cause cancer and other harmful effects on cognition and the reproductive system, as well as in animals and plants. They called for authorities to create better guidelines and enforce stricter standards. As we reported in 2019, that open letter never mentions AirPods specifically, for a simple reason: In 2015, they did not exist. The research has yet to find proof they're cancer-causing, or even a correlation between Bluetooth earbuds and poor health, as of the time of this writing.