When Edgar Burroughs is given his uncle's private journal, he first turns the book so that he can open the lock with his right hand. After the attorney leaves, he turns it another time, just to put it in the same position again.
At the beginning Powell tells Carter that the U.S. Army needs his help in dealing with the Apaches and recites his assorted achievements while serving in the Confederate Army. Under the 14th Amendment, anyone who participated in the Rebellion was ineligible to later serve in any position of honor under the U.S. government. Not even a Presidential pardon could change this. However, the disability could have been lifted by a two-thirds vote by both Houses of Congress, something not likely in Carter's case.
When John Carter first tries to leap over the white ape, the chain linked to his ankle drops him short about halfway across the arena. A couple of minutes later, after his chain gets tangled around the ape, wrapping around its enormous body several times, the amount of free chain looks to be nearly the entire length of the arena.
John Carter: [voice over]
My dear Edgar, I remember how I used to take you on my knee and tell you wild tales, which you always did me the great courtesy of believing. Now you are grown, time and space have parted us, but I reach out across that distance, to that same wide eyed boy and ask him to believe me once more. This wild tale begins thirteen years ago, in the Arizona Territory, between the Pinaleño Mountains and the backside of hell.
What other films have been based on Edgar Rice Burroughs stories?
Check out Edgar Rice Burroughs' page here for information about Tarzan.
Isn't the surface of Mars supposed to be red instead of yellow?
A common misconception. Although it is true that Mars appears quite red as seen from outer space, this is due to large amounts of dust in the atmosphere. While standing on the surface, however, Mars would appear to be a more butterscotch yellow than red, according to experts. The reason why early photographs of Mars' surface (as taken by probes) appear red is because those pictures were taken in greyscale (essentially black and white), and later colour-corrected with the (wrong) assumption that the major colour would be red.