The Paratime Levels
In Piper's Paratime universe, there are an infinite number of timelines, but in each timeline, events occurred differently. They are grouped into five Levels, based on the probabilities of success of an attempt by Martians to colonize Earth 75,000 to 100,000 years ago; humans, on timelines where they are present, are the descendants of the Martian colonists.
Read more about this topic: Paratime Series
Famous quotes containing the word levels:
“The only inequalities that matter begin in the mind. It is not income levels but differences in mental equipment that keep people apart, breed feelings of inferiority.”
—Jacquetta Hawkes (b. 1910)