Robert Langdon Robert Langdon Professor Robert Langdon is a fictional character created by author Dan Brown for his "Robert Langdon" book series: "Angels & Demons" (2000), "The Da Vinci Code" (2003), "The Lost Symbol" (2009), "Inferno" (2013) and "Origin" (2017). He is a Harvard University professor of history of art and "symbology" (a fictional field related to the study of historic symbols, which is not methodologically connected to the actual discipline of semiotics). Tom Hanks portrays Langdon in the "Robert Langdon" film series, starting with the 2006 film adaptation of "The Da Vinci Code", reprising the role in the 2009 film adaptation
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