It remains a mystery as to why there are vast differences in twin birth rates among the different regions of the developing world. Past research suggests that identical twins occur at a relatively ...

An interview with Paula and Bridgette Powers – identical twins who witnessed their mother’s carjacking – recently went viral. The way they spoke and gestured in unison has captivated global audiences.

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 ...