At the beginning of the film, when Taylor and his crew are trekking out of the Forbidden Zone, Taylor's backpack disappears and reappears between shots.
Several of the outside shots of the spacecraft show the outer hatch removed long before Taylor orders it to be blown.
When Taylor is stripped in the "hearing" scene, it is supposedly because his clothing stinks. In a long shot, he is holding the stinking clothing up to his chest which doesn't make sense as the clothing would still stink; in close shots, he is not holding his clothing to his chest, implying that he is nude, and then, when he freaks out and they hold him down, he is clad in his original outfit again as if he had never been stripped.
The font Taylor writes the "My name is Taylor" note on is drastically different from that he later writes notes for Zira and Cornelius in while in their home. Also, when Julius knocks Taylor onto the floor of his cage for mugging Zira of her note pad, his note "My name is Taylor" is clearly facing up on the ground, but it's suddenly facing down when Julius picks it up to return it to Zira.
When Nova is being taken away, a lot of water is sprayed into the cage. In the next wide shot, no water can be seen in the cage or on the floor, where it would spill onto.
(at around 7 mins) In the opening crash sequence, water is seen flooding into the space ship under tremendous pressure. The crew compartment is the part in the air, and since the ship is "floating" half-in and half-out, there would not be that kind of water pressure in that section of the ship.
The speed of the spaceship would be very close to the speed of light, so that it would travel at least 2,000 light years in the 2,006 years it was in flight, but Taylor says the are 320 light years from Earth. A light year is the distance light travels in one year, approximately six trillion miles.
For the nerds, the speed of the ship would be 99.99997% the speed of light based on six months ship time corresponding to seven hundred years Earth time.
For the nerds, the speed of the ship would be 99.99997% the speed of light based on six months ship time corresponding to seven hundred years Earth time.
Time dilation (slowing of time) is part of EINSTEIN'S Special theory of Relativity, and has been proven tens of thousands of times, so it is not an UNPROVEN theory as stated.
The wound dressing on Taylor's neck would not continue to show a red spot of coagulated blood (and possibly pus). It would rapidly change into a brownish colour.
The ape civilization does not know any advanced technology except for primitive cameras and guns. Producing of energy sources seems to be totally absent. Therefore it is impossible to use a hose to spray Taylor in his cage. That demands some kind of pressure and will need energy from a generator or some other mechanical device.
Contrary to the foregoing, it is possible to produce a pressurized jet of water by gravity alone. The gravity-fed fountains at Chatsworth and Stanway in the UK, project vertical jets of water to a height of 200 feet.
(at around 9 mins) Just before the spacecraft sinks, all the power goes out, and the crew abandons ship. Taylor takes a final look at the stopped clock, frozen in the last moment it recorded, as clocks do in real life.
Early in the film several gorillas pose for a picture with dead humans. Camera technology is very advanced, required various chemicals and processing, both to create raw film, develop film negatives once it is exposed, and create final prints. There isn't any evidence of electrical generation or chemical production facilities. On the other hand, there is a fair amount of modern technology to be seen, including firearms, which indicates industrialization.
After the astronauts' clothes are taken and destroyed by the wild humans while the three of them are bathing in the lake, Dodge fashions a makeshift garment out of what appears to be the remains of the lifeboat they used to flee the sinking spaceship, and left behind when they began their trek several days earlier. That's not the lifeboat Dodge used for clothing, it's a sun tarp that had been packed with their gear; a deleted scene showed the tarp set up in the desert.
When Dodge blows the hatch, the windows fly out into the water; then, in the next scene, inside the spaceship, the windows are still in place.
While being hunted, many humans dive prematurely, either before they get to the net or even before the net goes up.
Actors' lips and teeth can be seen behind the ape make-up at several points, giving the apes two rows of teeth. One example is Dr. Zaius in his first scene.
The exposed skin of the actors' necks can be seen beneath the ape masks in a few scenes where the actors suddenly turn their heads. Such as when Julius is questioning the order to release Taylor and when Cornelius is arguing on the beach at the end.
Nova has clean shaven legs and armpits even though she lives in the wild like an animal.
At beginning of movie Heston is smoking a cigar, clearly violating safety protocol in an oxygen rich environment.
When Dr. Zira first observes Taylor standing in his cage, the notepad she pulls out of her coat front pocket strongly resembles a 4x4 pad of yellow Post-It notes (which ironically were invented in 1968, the year of the film's release).
As the ship arrives at the water's edge during the opening sequence, there are white boats docked at the shore.
At 58.29 you can see an equipment stand with a wheel.
When the crew first encounters the primitive humans, they are all dressed in skins and have no tools or technology. When they start running from the apes, a man is holding a small girl over his shoulder with her rear pointed toward the camera, and she is wearing modern panties.
Opposite to the other savages Nova wears mascara and pink lipstick and nail polish.
(at around 15 mins) After Landon sets up his tiny American flag, Taylor lets out a howling laugh, but in the shot his teeth are clenched (as though he were giggling).
(at around 57 mins) The shadow of the camera is visible on the wall as Taylor goes down the spiral stairs in the "human museum".
Early in the movie during the establishing shots when the crew is marching through the desert through to the Forbidden Zone, a panoramic shot of the surrounding canyons shows a man next to an automobile in the distance.
When Taylor is running through the ape museum, the shot where the mom and child ape run into him, there is a grip stand leg/wheel seen in the far right of the screen for a few seconds.
Taylor and Lucius walk around the edge of a cliff and end up on a cliff on the opposite side of a river valley which is physically impossible without climbing down into the valley, crossing the river and climbing back up the opposite side.
Landon asks why he cannot read on Taylor, i.e., figure him out, then in the next breath he says, "but you, you're no secret," in clear contradiction to his previous statement. He even goes on to psychoanalyze Taylor. Both statements can't be true.
It should have been obvious that the three astronauts did not belong with the other humans since they were wearing garments, while torn and tattered, were woven and stitched while the primitive humans wore crude animal skins.
When the spacecraft starts sinking the crew of three men get into a life raft. The raft is barely large enough for the three men, however there were originally four crew members of the space craft. If the fourth member (Stewart) would have survived the flight and crash, there would not have been enough room for her in the life raft.
At minute 22, right after their water check, Dodge mentions the 'strange luminosity at night, yet there's no moon'. If the crew is in fact back on Earth, 2000 years in the future, the moon should still be there, although it might be 'new', i.e. not visible. (Note: It's not out of the question for the moon to have been destroyed by a wandering space body in the stretch of time since Taylor's ship had left Earth).
The sun should have given away that Taylor and company were really back on Earth.
The astronauts find a plant which they declare their first "life" seen on the planet. They are oblivious to the grassy ridge behind them, seen when they are squatting. Scientist Dodge's first reaction to the "life" is to tear it up for no reason, something no sensible, ethical person would do.
The astronauts conclude that no life is possible on the planet. But the air is breathable, the temperatures are congenial, and the water is not hurting them. They forgot to check these while checking the soil.(Note: The astronauts tested the soil and simply stated "Nothing will grow here").
Taylor says to the other astronauts - "Your loved ones are dead and forgotten for 20 centuries. 20 centuries! Even if you could get back, they would think you were something that fell out of a tree." The difference between a human in 1972 and a human in 3978 shouldn't be much different than that between a human from 1972 and one from the days of Caesar Augustus. (Note: Presumably, if they could get back home, Earth would age a further 20 centuries during their return trip).
It seems odd that Taylor, even with his neck injury, could not communicate until he wrote his name on a piece of paper. Prior to this he could have whispered something, or "spoken" with his lips in the hopes the apes could read lips, or if nothing else he could have let them know he understands the apes with pantomime. (Note: Taylor did move his lips but while doing so, he actually tried to speak, which caused pain to his throat wound - Zira: "Dr. Zaius, I swear he's answering you". He in fact does use pantomime in the very next scene with the map in Zira's office).
Nova has a wardrobe slip when Taylor is being loaded into the capture wagon.