Unique Types of Twins

Nature’s equivalent of “copy and paste”

photo by Chan, courtesy of Unsplash

Most twins fall into two main categories: identical or fraternal.

Identical twins are monozygotic, meaning that they originate from the same, single fertilized egg. In these cases, the egg eventually splits into two separate parts. But, since both twins still come from the same egg and sperm, they will have completely identical…