Woolly mice are a first step to resurrecting mammoths, but there's a very long way to go

US biotechnology company Colossal Laboratories and Biosciences has a radical proposal: it wants to resurrect the woolly mammoth from extinction. In a preprint paper published on March 4, scientists at Colossal report making a significant step towards this objective. They genetically modified the DNA of mice to give them mammoth-like traits in their hair shape, color and length.