Related Clues:

• Where it all started
• Start of something
• Darwin's study
• It can be found in a tree
• Genealogist's quest
• Darwin's "The __ of Species"
• Beginning point
• Information in a tree
• Fountainhead
• Line of descent
• Eagle
• Inceptions
• Commencements
• Intersection of the x and y axes
• Where the x and y axes meet