Potatoes were introduced to Ireland in the 1500s after they were discovered by Spanish colonizers of South America. Maya Angelou was the first African American woman to write a non-fiction best seller. Around 39% of humans have an extra small bone behind their knee called a fabella. The most common birth day is Tuesday, while Saturday is the least common. The record for having the most children goes to a Russian peasant woman in the 1700s. She had 69 children in 27 pregnancies, including four sets of quadruplets. Pope Gregory IX was apparently a dog person, because he tried to exterminate all cats from Europe.