Twins can have different biological fathers
In 2009, Mia Washington gave birth to twins with two different fathers, a one-in-a-billion occurrence. One month, Mia released two eggs instead of one. Her two sexual partners each fertilized one of the eggs, resulting in two babies with two dads. In 2011, there were only 3 known cases of this occurrence.
Trained sniffer dogs can tell the difference between identical twins
In rare cases, twins can be different races.
Although it may be hard to believe, Kian and Remee are twins. This is the result of a one in a million combination of their parents’ genes, who have white mothers and black fathers. If a parent is mixed race, their eggs or sperm contain the genetic code for both black and white skin and in very few cases this results in twins of different skin colors.
Separated twins can live eerily similar lives
Jim Lewis and Jim Springer were four weeks old when they were separated, with each of the twins going to different adoptive families. It was later discovered that their lives shared some truly remarkable similarities. Both had a dog named Toy as kids. Both married twice, first to women named Linda and second to women named Betty. Both drove Chevys, smoked Salem cigarettes, and drank Miller Lite.
They can even end up getting married
In 2011, a married couple from Britain discovered that they were actually twins who had been separated at birth. The brother and sister were able to get their marriage annulled.
If a pair of identical male twins marry a pair of identical female twins, their children will legally be cousins but genetically be full siblings.
Two children are genetic siblings if the chromosomes both children received were derived from the same pool. Since the genetic pool of identical twins are identical, these two sets of parents would produce children from identical pools.
Women who give birth to twins may live longer
Women who give birth to twins are generally healthier and stronger to begin with than those who don’t. Some believe that twins are an evolutionary adaptation, where the healthiest of mothers take the chance to pass on double the genes at once.
Tall women are more likely to have twins
The Long Island Jewish Medical Center discovered that taller women have more insulin-like growth factor (IGF) – a protein that increases a woman’s chance of ovulating. The more IGF a woman has, the greater the chance that she will become pregnant with twins. Other research found that women who gave birth to twins were on average one inch taller than other mothers.
Women who eat a lot of dairy are also more likely to have twins
Twins interact with each other in the womb
Twins that are exact reflections of each other are called Mirror Image Twins
Some conjoined twins can hear each other’s thoughts and see through each other’s eyes
A mother’s body adjusts uniquely for twins
The highest rate of twin births is in Central Africa
One of the easiest ways to tell identical twins apart is their belly buttons
The chances of having twins is far higher than it was 30 years ago
A woman is more like to give birth to fraternal twins if she is one herself, has already given birth to fraternal twins or has a sibling who is a fraternal twin.
Identical twins do not have identical fingerprints
Fingerprints are not solely shaped by DNA. Although they start with the same fingerprints, during weeks 6 to 13 of pregnancy, when the twins start to move, they touch the amniotic sac which forms unique ridges and lines.
Identical twins can make master criminals
Apart from their fingerprints, identical twins are 99.99% identical on a DNA level. In January, 2009, $6.8 million worth of jewelry was stolen in Berlin. The single suspect (who was wearing gloves) left behind sweat beads, which police extracted DNA from and tracked down to two people – Hassan and Abbas O. – identical twins. Both denied responsibility, accused the other, and because police couldn’t identify which of the twins the DNA belonged to, both ended up walking free.
Nearly half of twins invent their own languages
We can only assume they’re planning the perfect crime. Too cute!