Patent ductus arteriosus (PDA) is the persistence of an opening that allows the blood to skip circulating through the lungs after a baby is born.
Extremely powerful ARM microcontrollers have been around for ages now, but only recently have they been available for just a few dollars with a good enough toolchain for some serious development work.
Ariana Grande is obsessed with her new boyfriend, Mac Miller.
PDA is back in a big way, and people seem to be yearning openly again.