By successfully modifying seven genes simultaneously, genetic engineering company Colossal Biosciences created mice with altered coat color, texture, and thickness in line with the extinct woolly mammoth's core phenotypes.

Extinction is still forever. But scientists at a biotech company are trying what they say is the next best thing to restoring ancient beasts.

Using CRISPR, a powerful gene-editing tool, they targeted ten genes in mice associated with traits like hair length, texture, and fat metabolism. The resulting mice had woolly coats, curled whiskers, and golden fur — traits that echo those of their prehistoric cousins.