4, Twins do not have to have the same father. While we often think of twins as having the same mother and father, it’s possible for a woman to give birth to two children on the same day who don’t share a father. This phenomenon is called heteropaternal superfecundation. It happens when a woman releases multiple eggs, each fertilized by sperm from separate instances of sexual intercourse. It’s uncommon, but genetic testing has shown that it is possible.
5, Identical twins have different fingerprints. Some people might think that identical twins are the same right down to those whorls and swirls on their fingerprints, but while identical twins share most of their genetic material, identical fingerprints aren’t among them. While the fingerprints may be very similar, on close examination it is possible to tell them apart – much like the twins themselves.