Factual error: The accident takes place the night of July 18, 1969, and they show there being a full moon. That night the moon was actually waxing crescent with only 14% visible, and set at 10:27pm while the accident happened about 12:45am, so there was no moon in the sky anyway.
Factual error: One of the deaths involves a burning candle, a car and a leaking fuel tank, resulting in an explosion. This wouldn't happen. Multiple independent test evidence that petrol/gasoline can't be ignited this way, a flame isn't hot enough. Only the fumes can be ignited, which isn't what happens here, and the tank wouldn't explode anyway.
Factual error: The film informs us the gravity on Neptune's moon Triton is less than 8% of Earth's. But the whole physics of the rocks and his movement on the surface do not reflect that. The actual surface is frozen nitrogen. The difficulty he has in moving around is not well correlated by him only weighing 7kg. Https://www.imdb.com/title/tt5361488/.
Factual error: For a movie about the Amazon Basin, it is too bad they pictured many birds from the zoo or computer generated "who knows what." They used a Great Hornbill and African vultures (griffons or white backed vultures) - not South American. They also used computer generated white birds flying over River in "V." Could have been a flock of Cattle Egrets, but just was not right for them.
Factual error: "Colonel" Roderick has incorrect rank insignia on his collar. Looks like Sergeant First Class (three above, two below).
Factual error: The police Lieutenant Hightower is wearing the rank of Captain.
Factual error: When the bank robbers pull the money out of the vault, they claim all the cash is from 1982. Yet most of the bills have large faces, which was introduced into rotation in 1996.
Factual error: Will's Range Rover has a rear New York license plate but not the required front plate. (00:08:25)
Factual error: The black leather chair of the Home trust banker is more modern than the movie setting in 1922. (00:59:35)
Factual error: There are references to failures of novels by Dickens that were actually not written until after the events depicted in the film (e.g. Martin Chuzzlewit and Romney and Son).
Factual error: The family's roadtrip was during "summer vacation", but there was intermittent Fall foliage (yellow, orange, red leaves) during their four days traveling. Quite often, the foliage was closer to what would be expected in late September or October and even November.
Factual error: When Tonya is walking through the kitchen at her job at Spud City, she complains that someone took her smokes and walks by an appliance to her left. The design style of the appliance did not exist in the early 1990s.
Factual error: Performing for Queen Victoria is the famous opera composer Giacomo Puccini. This happens during her sojourn in Florence in 1888. Puccini was born in 1858, so he was barely thirty years of age, but the actor portraying him, Simon Callow, is in his late 60s (and it shows). Moreover, he is presenting his latest creation "Manon Lescaut"; in 1888 he hadn't even started working on it.
Factual error: Allegra was said at the end of the film to have died aged 10. She was actually 5 years old when she died.
Factual error: Engine 463's firebox is seen in a close-up, revealing a cast in date mark of 1914. The caption near the start says it's set in 1892. (02:02:00)
Factual error: Emmanuelle Devos goes to the airport to get her husband and daughter. Their plane landed at 7 PM (18:58 to be precise) as shown by the airport monitor. They get a cab to a hotel downtown, and then there's a scene when she books a restaurant from the hotel room. She tells her husband, who just took a shower, that they need to be at the restaurant at 8 PM. Her husband says that there's no rush then, since it's only 7 PM. Of course that's impossible, the Turin airport is about 20km away from the part of the city they are driving through, which at that hour has also significant traffic; if their plane landed at 7, at 8 PM they would hardly have any time left to spare. (00:29:00)
Factual error: At the end, when the EMP explodes, the aliens are affected by the EMP but lights on the building and street lamps are still on. (01:19:35 - 01:20:15)
Factual error: The man cutting through the door is pictured holding a torch, but that type of torch is not a cutting torch. You also see a showering of sparks as though a grinder is being used. (00:42:00 - 00:43:00)
Factual error: The musicians in the (real) Band of the Coldstream Guards that plays Happy Birthday for Christopher Robin are wearing their 21st-century uniforms and medals.
Factual error: When Willie is taken from the hospital to appear in a criminal lineup, he is wearing a special watch he received for his birthday. When you are admitted into the hospital, the first thing you have to remove is a watch and/or jewelry.