Scientists could build us those new organs using metal nano-particles suspended in a magnetic field. The idea is that while researchers have been able to "build" organs in the past, they've been doing it on a 2D surface. Since this can lead to abnormal behavior in cells, researchers had to build in 3D:
"By injecting cells with a metallic gel, the researchers have succeeded in suspending cultured cells in a three-dimensional magnetic field. With this magnetic scaffolding, organs can be grown in the right shape, and with no foreign material."
This is early research and intended for those with life-threatening need for organs.
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