The twin on the left contemplates her brotherCourtesy Pat RyanIn Great Britain it's been discovered that twins, who had been separated at birth and raised in different families somehow met in later life and married each other without knowing they were brother and sister.

The bizarre story has raised concerns of the importance of adopted children being able to find out information about their biological families.

The identity of the two people involved is being kept secret, and since the discovery their marriage has been annulled. But efforts are underway to insure that something similar doesn't happen again.

Each sibling said they felt a strong attraction to the other, something that has been seen in other separated sibling cases.

"We have a resistance, a very strong incest taboo where we are aware that someone is a biological relative," said Pam Hodgkins, of the charity Adults Affected by Adoption. "But when we are unaware of that relationship, we are naturally drawn to people who are quite similar to ourselves. And of course there is unlikely to be anyone more similar to any individual than their sibling."

STORY SOURCE
BBC.com