A veteran veterinarian delivered the first known biologically identical puppy twins in South Africa, researchers who tested the pups' DNA over several weeks confirm. Kurt de Cramer, who works in South ...

Identical, or monozygotic, twins develop from the same fertilized egg that splits into two. These twins are the same sex and share the same genes. Sometimes called paternal twins, identical twins ...

When I was a child one of my favorite books was about a pair of identical twins who decided to switch clothes. They looked so much alike that their parents had had to dress one in blue and the other ...

This one's for the dog-lovers: An Irish wolfhound has given birth to the first documented set of identical twin puppies. Kurt de Cramer, a veterinarian in South Africa, delivered the babies via ...

In 2004, Michigan police found that DNA recovered from a crime scene matched that of Jerome Cooper, a notorious criminal. But what seemed like an open-and-shut case got complicated when the cops found ...