A mouse with two dads — or a bi-paternal mouse — has made it to adulthood. Several mice, in fact. As detailed in a study published in the journal Cell Stem Cell, scientists achieved this feat of same-sex, murine parenting by using CRISPR techniques to rein in rogue genes that undergo a troublesome process known as imprinting.  We're still far from replicating this feat in humans, but it marks a milestone in same-sex reproduction in mammals. Until now, many similar attempts have resulted in unhealthy offspring. "The unique characteristics of imprinting genes have led scientists to believe that they are […]