What have you learned and thought was interesting? It can be about anything.
I read that the style of Sideburns came into being from a Union general named Ambrose Burnside because of the way he chose to cut his beard. Sideburns first became popular in the mid-19th century during the American Civil War and experienced major cultural revivals in the mid-20th century, particularly during the 1950s through the 1970s.