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The big science news this week is xenotransplantation.Â
The transplanting of tissues or organs from animals to humans.Â
In a medical first, two weeks ago in the US we saw the first transplanted (genetically modified) pig’s heart into a human patient.Â
This isn't the first time that scientists have attempted to use animal organs to replace human ones, but previous attempts have failed.Â
Nanogirl, Dr Michelle Dickinson, joined Francesca Rudkin.Â
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