John Langdon (typographer) Langdon is known mostly through his association with Dan Brown, and the novels "Angels & Demons", "The Da Vinci Code," "The Lost Symbol, Inferno, and Origin". The protagonist of these novels was named Robert Langdon as a tribute to John Langdon, and he will continue to be so for his next 12 books, an estimate given by Dan Brown himself. Langdon is now a professor of typography and corporate identity at Drexel University in Philadelphia. He continues to do work on ambigrams, as well and fine art works that incorporate language, type, and philosophy. Langdon credits his paternal grandparents for
Robert Zubrin featured in the Symphony of Science video "The Case for Mars" along with Carl Sagan, Brian Cox, and Penelope Boston. The fictional character Dr. Zachary Walzer in the 2010-11 independent VODO series "Pioneer One" was inspired by Zubrin. In 2016, Zubrin was one of several scientists and engineers interviewed in the National Geographic miniseries "Mars". Robert Zubrin Robert Zubrin (; born April 9, 1952) is an American aerospace engineer and author, best known for his advocacy of human exploration of Mars. He and his colleague at Martin Marietta, David Baker, were the driving force behind Mars Direct, a proposal intended