1. The method of space travel in this film 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.
2. 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.
3. 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.
4. 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 he actually made a profit.
5. On the first planet a single second would be about one and a half days in earth time.