One quick glance at Cora and Jessica Santos is all that is needed to see they are the ideal tandem on the tennis court. They seemingly always predict each other’s next move. They have the type of ...

Twins may often make you imagine two babies with the exact physical features, such as eyes, smile, and even voice. However, this is not the case with every twin, as some look totally different from ...

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 ...