This is the kind of story know-nothing politicians like to expose: researchers working with a tiny sailboat in an aquarium that’s inside an MRI machine.  But this was the way engineers at Brigham & Women’s Hospital and Tel Aviv University developed a wireless, capsule “endoscope,” that can respond to magnetic currents while “swimming” in the small intestine.  Indeed, it would remind a sailor of how a sailboat tacks in the wind. MORE