An anonymous reader writes "Using stem cell technology,
reproductive scientists in Texas, led by Dr. Richard R.
Behringer at the M.D. Anderson Cancer Center, have produced male
and female mice from two fathers. The study was posted Wednesday
at the online site of the journal Biology of Reproduction. The
achievement of two-father offspring in a species of mammal could
be a step toward preserving endangered species, improving
livestock breeds, and advancing human assisted reproductive
technology. It also opens the provocative possibility of same-
sex couples having their own genetic children, the researchers
note."