The Surprising Truth About Twins

Scientists study a connection that just might transcend human emotion

Identical twins are the subjects of a dozen probing scientific studies.

“The bond between twins is stronger than between mother and child, or between husband and wife.”

As starkly dramatic a statement as that is — and it was made by Donald Keith, not only a twin himself but also the director of the nonprofit Center for the Study of Multiple Births — an exploration of the lives of…