“A “neurotheology” researcher called Dr Michael Persinger has developed something called the “God Helmet” lined with magnets to help you in your quest: it sounds like typical bad science fodder, but it’s much more interesting than that.Persinger is a proper scientist. The temporal lobes have long been implicated in religious experiences: epileptic seizures in that part of the brain, for example, can produce mystical experiences and visions. Persinger’s helmet stimulates these temporal lobes with weak electromagnetic fields through the skull, and in various published papers this stimulation has been shown to induce a “sensed presence”, under blinded conditions.
There is controversy around these findings: some people have tried to replicate them, although not using exactly the same methods, and got different results. But however improbable or theologically offensive you might find his evidence, because it is published and written up in full, you can try to replicate it for yourself and find out whether it works. In fact, you really can try this at home: the kit needed to make a God Helmet is fabulously rudimentary.”
(via Pure Pedantry)