timothy from the open-your-shirt-and-say-aaaaah dept.
An anonymous reader writes "Researchers at Northeastern University have modified an iPhone to take readings from a special fluorescing nanoparticle tattoo ink, which can then measure sodium and glucose levels in the blood."
I have yet to see any problem, however complicated, which, when
you looked at it in the right way, did not become still more complicated.
-- Poul Anderson