Up to 4% of people are said to hear a strange low-pitched noise known as the Hum, but no source has ever been found.
In an age of wild claims churned out by politicians, media and advertisers, perhaps people don’t care as much any more.
Does the sound of your own voice make you want to cover your ears? You are not alone.
Despite 22 Americans reporting symptoms, no evidence of a weapon has been found. Experts suspect a psychosomatic disorder linked to high stress in Havana.
New research suggests that seemingly otherworldly sensations linked to near-death experiences may actually be rooted in brain activity associated with psychedelics.
Scientists are replacing traditional definitions based on brain death with new concepts based on cryogenics and AI.
Scientists have managed to restore some function to disembodied pig brains. But does this mean that we need to rethink what we mean by "brain dead"?