Cloning could be the hero in conservation efforts or a creepy new market. Scientists have turned male mice into females by removing their Y chromosome using CRISPR, opening doors to unique genetic opportunities.

The case for cloning is strongest when it comes to preserving endangered species, like black-footed ferrets and Przewalski's horse, whose tissues are cryo-preserved in 'frozen zoos'. Biotech companies even dream of resurrecting extinct animals, with the thylacine and woolly mammoth at the top of their wish lists.

But the ethical debate rages. While some see cloning as a miracle, others fear it could be used for profit or exploitation, like dog cloning which has been linked to 'the exploitation of the canine underclass'. Meanwhile, the possibility of human clones without brains raises more questions than answers.

As technology advances, we're left with tough choices. Will cloning save the planet, or just our organs?