This set of quadruplets were born on leap day, but that’s not even what makes them unique.

At birth, doctors believed that two out of the four babies were identical, an occurrence that happens only one out of a million cases. But now, doctors believe that three of the babies, Joshua, Zachary and Rueben could actually be identical.

Watch below to see the “miracle quads” who are now turning 6-months-old.

Source: BBC