Photo credit: Live Science

In 2016, researchers in the US successfully implanted lab-engineered bones into 14 adult Yucatan mini pigs. None of the pigs rejected the new organs after surgery. Quite the opposite. The blood vessels inside the lab-grown bones seamlessly integrated themselves into the pigs’ preexisting circulatory systems.

How was all of this possible?[1]

To get the process started, scientists scanned the pigs’ jawbones and mapped their structures. They then created matching cell-free scaffolds out of cow bones. These structures were injected with the pigs’ stem cells and soaked in a nutrient-rich solution. The result was fully functional, living bone

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