The words "identical twins" may conjure images of Mary-Kate and Ashley Olsen, Fred and George Weasley, or even the little girls in The Shining (who are actually very normal-looking these days). You ...

Photographer Peter Zelewski has spent the last couple of years exploring the special world of identical twins, questioning not only the incredible bond between them, but also what makes them different ...

He grabs the can out of the refrigerator at Emory Brain Health. “I wanted to get John a Coke. He doesn’t drink caffeine so I got him a ginger ale.” Michael Madzin pays for his brother’s drink and ...

Usually, identical twins are born looking just that way: identical. But for a pair of parents in the United Kingdom, telling their identical newborns apart won’t be so difficult— one was born with ...

Researchers solved a major biological question by using a groundbreaking computer algorithm to find identical DNA sequences in different plant and animal species. Analyzing massive amounts of data ...

The Science of Siblings is a new series exploring the ways our siblings can influence us, from our money and our mental health all the way down to our very molecules. We'll be sharing these stories ...

Curiosity may be key to distinguishing among identical twins — at least when it comes to rodents. A new study of genetically identical mice throws more data into the long-running debate over how ...

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 ...

Does the age of a mother influence the traits and characteristics of her progeny, and how? A team of scientists have addressed these questions by studying tiny, genetically identical C. elegans worms.