Despite unprecedented conservation efforts, Sudan, the last male northern white rhino, died out in Kenya in 2018. He is the symbol of a major crisis: the sixth mass extinction. Every year, animal and plant species disappear forever, making biodiversity ever more fragile. But thanks to advances in genetic engineering and biotechnology, scientists are dreaming of reviving what was thought to be lost forever. Research programs are springing up all over the world. What if de-extinction was a new hope?
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