Continuity mistake: After the scene where he gets hit in the head and he travels into the future 800000 years, he has that gross stuff and blood on his mouth. In the next shot you only see the blood.

The Time Machine (2002)
21 mistakes
Directed by: Simon Wells
Starring: Guy Pearce, Jeremy Irons, Mark Addy, Orlando Jones, Phyllida Law, Samantha Mumba, Yancey Arias
Uber-Morlock: You built your time machine because of Emma's death. If she had lived, it would never have existed. So how could you use your machine to go back to save her?
Trivia: The director of the movie, Simon Wells, is the great grandson of H.G. Wells.
Question: How is the hologram artificial intelligence system still operational and has power after 800,000 years?
Answer: It's a plot hole. Just as, in the original 1960 George Pal movie, the Eloi are still human and speaking 20th Century English. After 802,000 years, all artifacts and traces of our modern civilization will be long, long, long vanished (excepted perhaps for a handful of fossilized bones). Additionally, after such a long time, the human species will probably be long extinct.
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Answer: We don't know what kind of power supply the AI system is running upon, but it's possible it's a system that works on some unlimited energy source that doesn't need fuel or uses very little energy.
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