Twins have been rare in human history and for that reason can seem special. Many cultures associate twins with health and vitality, while others see them as a philosophical reminder of the duality of ...

Globally, mothers are having fewer children. Yet despite this latest observed decline in birth rates, the number of twins and triplets being born today is higher than ever before. This is the first ...

Twins, triplets, and other multiples have long caught the attention of “singletons,” or those of us born without a built-in best friend by our sides. Twins—and the media—annually descend on Twinsburg, ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Our recent research suggests that twins were actually the norm much further back in ...