Factual error: The story is set in 1976. "Funkytown" is used in the movie and the end titles. The song was not released until 1980.
Factual error: The Skycrane helicopters have a max takeoff weight of 42,000 lbs. With them weighing in at 19,200 lbs, that leaves 22,800 lbs that they could lift. Even small carracks, the ships, weigh around 180,000 lbs.
Factual error: The deer in the forest somehow does not hear the giant dinosaur approaching, so doesn't run away. (01:21:10)
Suggested correction: A different interpretation is that the deer knows the difference in the sounds - gurgling/roars of an approaching herbivore versus carnivore - so it didn't perceive it as a threat until it got unusually close (so the deer looked to see why). The dinosaur flung the deer aside, then proceeded to eat the vegetation where the deer was. It isn't likely that the dinosaur (if a carnivore) would toss aside a fresh deer meat brunch in favor of some green brush.
Factual error: In the subplot on earth, the heroes' family members are trying to outrun the falling moon's gravity that's sucking everything into the air. So, naturally they duck into a barn, because, of course, gravity can't affect you behind a wall. And sure enough, behind the wall, they're suddenly safe.
Factual error: Robert and Giselle have their belongings shipped to their new home at "18 Honey Bee Trail, Monroeville NY 10960." Monroeville is fictitious but the 10960 ZIP Code belongs to Nyack, New York. (00:00:04)
Factual error: In the timelapse footage showing the street outside Bob's Restaurant, the shadows are moving in the wrong direction. In the northern hemisphere, shadows go clockwise. (00:13:46)
Factual error: The film gets basic physics wrong while trying to depict relativity. Buzz Lightyear leaves T'Kani Prime for a trip around its sun, travels with near-light speed, and returns four years later. This could only have happened if T'Kani Prime's sun were at least two lightyears away! It gets more ridiculous. Buzz's last trip takes 26 years, even though he has traveled at faster-than-light speed. Overall, T'Kani Prime is experiencing either a mysterious time slow-down or a rapid orbit expansion.
Factual error: When Martine enters the passcode to reveal the bats, you see her hit "3" first followed by what seems to be "5" (the rest is blocked by her body). She then tells Michael his passcode is the first 6 digits of pi backwards. The first 6 digits backwards would be "951413."
Factual error: The nuclear missiles are shown in flight numerous times. They're travelling horizontally, and have their rocket motors on. Except that long range nuclear missiles are ballistic, and follow a curved path to and from space. And their rocket motors are on only for the thrust phase of the flight, and not halfway to the target.
Factual error: When the Allosaurus bent over to pick up her egg (which was almost touching a newly-thrown hand grenade), the hand grenade exploded only toward the right of the screen, engulfing the dinosaur. A hand grenade would/should explode in all directions. (01:19:30)
Factual error: When the magician has brought the crocodile home at the beginning of the movie and is trying to get him to sing, the crocodile is shivering because he's cold. The magician wraps him with a scarf and the crocodile warms up and is willing to sing. However, this would not work, as crocodiles are cold-blooded and unable to generate body heat. The crocodile would need a heat lamp or some other source to become warm again.
Factual error: "SOS" is written in the sand on the beach, close to the shoreline. A helicopter lands nearby and four people walk on the sand, leaving shoe imprints over a wide area. The helicopter departs, and the "SOS" is written as it is before the rescue, completely unscathed. The helicopter's rotating blades would disturb/scatter sand and cover most, if not all, of the "SOS." (00:06:14 - 00:06:35)
Factual error: Josephine walks away from her father King Louie 14th, after he tells her she has to marry the young Duke Lintillac for his money. When you look at back of Josephine, you can see a zipper in her skirt. King Louie 14th was King from 1643 until his death in 1715. The first zipper was invented was in 1851. The zipper being used as we know it present day was invented in the early 1890s by Whitcomb L. Judson. (00:55:57)