Not really “gadgety” but look at this: Scientists at the University of Minnesota have announced that they have engineered a (rat) heart by growing muscle and endothelial (vein coating) cells in a “gelatin” heart-shaped scaffold that also had all the necessary conduits. At the end, the heart could pump at 1/4th of a normal heart rate.
It’s not operational yet, but that is a remarkable milestone on the road to possibly “grow organs”. AP video
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