FORGET THE elephant shrew—meet the mammoth mouse. On March 4th Colossal Biosciences, an organization making an attempt to revive long-gone species, introduced that they’d genetically engineered a Mus musculus to have qualities of the extinct Mammuthus primigenius. As a substitute of Earth-shaking stature or huge tusks, the creature possessed an abundance of dense, golden fur. It was, in different phrases, lovely. “That was the principle unintended consequence,” says Ben Lamm, Colossal’s boss and co-founder.