Thirty years after Dolly the sheep became the first cloned mammal, cloning has evolved from a sci-fi idea into a biotechnology tool. Scientists now use cloning for disease research, conservation and agriculture, while challenges remain in efficiency, ethics, extinct species revival and human cloning
The International Union for the Conservation of Nature (IUCN) guidelines define de-extinction as the generation of proxies of extinct species that are functionally equivalent to the original extinct species, but are not ‘replicas’.
