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Scientists began with mice to see if the process works before possibly moving on to edit embryos of Asian elephants, the woolly mammoth's closest living relative.

On Tuesday, Colossal announced that its scientists have simultaneously edited seven genes in mice embryos to create mice with long, thick, woolly hair.

Using modern genetic engineering techniques, they've created mice with long, thick hair that resembles the scruff of the extinct woolly mammoth.

Colossal Biosciences announced Tuesday that it has simultaneously edited seven genes in mice embryos to create mice with long, thick, woolly hair.