Carl Sagan

Carl Sagan was not a great father to one of his kids. One of his sons talks about how absent a father he was. This double take on Sagan comes from “Carl Sagan: A Life” by Keay Davidson. According to the book, Sagan was a disloyal friend, a cynical careerist, a security risk, an abusive husband, a scientist who eschewed experiment, an educator who avoided students and a goofy pothead.