A series of grim experiments have revealed how toilet water sprays when we flush with the lid open, spreading potentially deadly germs into the air.
Scientists from the University of Colorado say an "invisible plume", which contains microscopic particles of pee or poop, is ejected from the toilet after flushing and can remain in the air for minutes.
Since the particles are invisible to the naked eye, researchers used bright green lasers and cameras to reveal how they are rapidly spread from a lidless public cubicle.
