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All facts were pulled from the Interstellar IMDB page, unless stated or sourced otherwise.
To create the wormhole and black hole, Dr. Kip Thorne collaborated with VFX supervisor Paul J. Franklin and his team at Double Negative. Thorne provided pages of deeply sourced theoretical equations to the team, who then created new CGI software programs based on these equations to create accurate computer simulations of these phenomena. Some individual frames took up to 100 hours to render, and ultimately the whole CGI program reached to 800 terabytes of data. The resulting VFX provided Thorne with new insight into the effects of gravitational lensing and accretion disks surrounding black holes, and led to him writing two scientific papers: one for the astrophysics community and one for the computer graphics community.
The apocalyptic Earth setting in this film is inspired by the Dust Bowl disaster that took place in the United States during the Great Depression in the 1930s. After Christopher Nolan watched the documentary The Dust Bowl (2012), he contacted its director Ken Burns and producer Dayton Duncan, requesting permission to use some of their featured interviews in the film. You can learn more about The Dust Bowl here.
The majority of shots of the robot TARS were not computer generated. Rather TARS was a practical puppet controlled and voiced on set by Bill Irwin who was then digitally erased from the film. Irwin also puppeteered the robot CASE, but in that instance had his voice dubbed over by Josh Stewart.
For a cornfield scene, Christopher Nolan sought to grow 500 acres of corn, which he learned was feasible from his producing of Man of Steel (2013). The corn was then sold and actually made a profit.
Early in pre-production, Dr. Kip Thorne laid down two guidelines to strictly follow: nothing would violate established physical laws, and that all the wild speculations would spring from science and not from the creative mind of a screenwriter. Christopher Nolan accepted these terms as long as they did not get in the way of the making of the movie. That did not prevent clashes, though; at one point Thorne spent two weeks talking Nolan out of an idea about travelling faster than light.
The method of space travel in Interstellar was based on physicist Kip Thorne's works, which were also the basis for the method of space travel in Carl Sagan's novel "Contact", and the resulting film adaptation, Contact (1997). Matthew McConaughey stars in both films.
Anne Hathaway suffered from hypothermia while filming in Iceland due to the fact that her astronaut suit leaked and filled up with icy water . To see an interview where she discusses what happened, click here.
A copy of Stephen King's novel "The Stand" is visible among Murph's books. King's book is about the near extinction of humanity and the survivors struggle to relocate and settle down. Similar to the plot of Interstellar.
According to Dr. Kip Thorne, the largest degree of creative license in the film are the clouds of the ice planet, which are structures that probably go beyond the material strength which ice would be able to support.
The shape of the space station is in reference to a clock face, with time being a major theme in the movie.
The very first line in the movie, spoken by Coop's daughter Murph is as follows: "I thought you were the ghost." She means that she heard him moving around and thought her "ghost" was making noise. Later in the movie, when Coop leaves he says to Murph: "Once you're a parent, you're the ghost of your children's future." These lines carry more significance when the ending is known; Cooper truly was Murph's ghost the whole time.
That's it! Is there anything that you felt should have been in this list? Let me know in the comments!