11Heteropaternal superfecundation
Heteropaternal superfecundation is a rare medical scenario whereby twins can be born of two separate biological fathers.
12Krista and Tatiana Hogan
There exists a case of conjoined twin girls named Krista and Tatiana Hogan, who are connected at the thalamus. They can hear each other's thoughts and see through each other's eyes.
13Daisy and Violet Hilton
When one of the Siamese twin Daisy Hilton died, her sister Violet remained alive and attached to her for several days before they were both found dead.
14Catherine and Kirstie Fields
Fields' disease is considered the rarest known disease in the world, with only two cases diagnosed (among two twin girls named Catherine and Kirstie Fields). It causes progressive muscular degeneration, and that's about all we know. Doctors concluded that "they were probably born with it."
15Twins restaurant
Tom Berenger once owned a restaurant called Twins on the Upper East Side, where the waitstaff consisted of 29 sets of identical twins.
16Twin types
There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
17Lina Hamilton and Leslie Hamilton
Scenes in the movie Terminator 2, where Sarah Connor and the T-1000's facsimile of her are in the same shot aren't CGI. Rather, it is Lina Hamilton and her non-actress identical twin sister, Leslie Hamilton, who acts as a very realistic body double.
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18Twin children
Young children, especially twins, will often develop their own language that they can understand but is unintelligible to any adult observers.
19Married Twins
A set of British twins separated at birth and raised by different adopted parents, fell in love and got married only to realize that they were brother and sister.
20Scott Kelly and Mark Kelly
In 2015, astronaut Scott Kelly became even younger than his elder twin brother (who is also an astronaut) Mark Kelly (born 6 minutes before Scott), by 3 milliseconds after the completion of his one year mission on the International Space Station.
