Dorothy Burlingham's TwinsThe study that explained why it's not so wonderful to have a look-alike.
Part 1: Russ Is My Identical Twin. At Least, That's What We've Always Said …
Dugon, Haus You Dinikin, Du-AhThe secrets of twin speak.
Confessions of a Twin ObsessiveBeing a singleton never seemed good enough.
Your Head on My ShoulderParasitic twins and other half-formed siblings.
Part 2: The Zygosity Test Results Arrive
Double InanityTwin studies are pretty much useless.
Rise of the TwinsA Slate special issue on the science, history and culture of multiple births.
A Brief History of the Double StrollerHow parents ferry their multiples, from the baby boom to today.
Are Twins Taking Over?Making sense of the dramatic rise in multiple births.