Factual error: When Brendan Fraser & his son are running to reach the pyramid before the sun hits it, the sunrise line approaches the pyramid along the ground, but the sun would naturally have hit the pyramid at the top first and worked its way down to the ground. [Some people insist on trying to correct this - think of it this way. If the sun's illuminating the ground from way up in the sky, what's keeping something higher up than the ground in darkness?] (01:34:40)
Factual error: When Rick and Jonathan (in his mysteriously foam free tux, as noted elsewhere) vault over the fence outside Rick's house, a thug is firing at them with a machine gun from an upstairs window. Look at the bullet impacts on the top of the fence - some of them could only happen where they do if the bullets had passed straight through Jonathan's body.
Factual error: After Evie is stabbed and dies in Rick's arms, if you look closely at her neck, you can still see a pulse in her neck. Dead people don't have pulses. Yes, obviously they couldn't have actually killed her for the shot, but at the same time they shouldn't have had a close-up of her neck either... (01:33:05)
Factual error: We get a panoramic view of London with the houses of Parliament, St Paul's Dome and Tower Bridge. The problem is that Tower Bridge has been moved next to the Houses of Parliament (they have put it in place of Westminster Bridge) and it should in fact be not visible at that point but several miles down river. St Paul's is also on the wrong side of the river. If this is where Tower Bridge is in the film then there are no low bridges for the bus to hit in the chase which follows the escape from the British Museum. Were it in the proper place there are quite a few. (00:20:35)
Factual error: Our Heroes are running after the Bad Guys who have kidnapped their "Precocious Kid." They are chasing them in a dirigible. We see them flying across the full Moon. A few nights later, we see them flying across... the full Moon. The phase of the Moon is probably the single most abused astronomy idea in movies (besides sounds in space). The Moon goes through phases as it orbits the Earth. The phase changes every night, and the difference over even two nights is pretty clear. It's possible, just, that over three nights the Moon can be almost full, then full, then a little past full. But usually the Moon is very different over the course of that much time. Really, the phase should have changed quite a bit during the chase. (01:00:25 - 01:22:50)
Factual error: Rick and his kid run to the pyramid, desperate to reach it before it is illuminated by the sun. This means that they will have to outrun the terminator line, the distinct line between night and day created by the rotation of the earth. They are in central Egypt, and at that latitude the terminator line moves at about 1300 kmh.
Factual error: In the beginning when Anck Su Namun is holding the black snake and says "Egyptian asps are very poisonous." The snake she is holding is a Mexican Black King Snake, a species native to Mexico and commonly kept as a pet in the U.S. (00:26:30)
Factual error: In the bus chase scene the 'prewar' bus has fleetnumber LT1097. Actually it's a postwar RT-class AEC Regent III bus built circa 1950. Although the LT class AEC Renown was a prewar class of London bus, these had three axles, two at the back. And - for the record - LT1097 did exist, but it was a 'Scooter' type single decker. (00:42:55)
Factual error: The dynamite Rick destroys the log bridge with appears to damage a very localised area. It makes a very narrow, clean cut down the centre, when any explosive you place on a log would naturally cause a wider area of damage to the top than the bottom.
Factual error: When Rick uses dynamite to destroy the log bridge, the log snaps several seconds after the explosion has gone off. The force of the blast would snap it instantaneously.