Science and Science Fiction: Humans as Batteries in The Matrix

March 18th, 2009

The Matrix is a pretty cool movie, a modern classic with an interesting premise and innovative special effects.   I always had a problem with it, related to the premise.   Some spoilers may follow.   Here’s my problem scene:

I’m not going to question the information about how much electricity or heat a human being can generate.   I am alive and know I get hot, that my brain uses electrical impulses.   What I am going to question is the idea that this makes humans a good way to generate or store energy.

This is classic biology and physics.   Classic bad biology and physics.

There’s no sunlight left, so the machines raise humans for energy.   “All the energy they will every need.”   And they feed them dead humans.

Huh?

Without sunlight, I don’t know why the world isn’t frozen, or at least cool at surface level, and I don’t know how plants can be grown to feed the humans.   And if you can grow plants then you can get energy straight from them (e.g., ethanol, alcohol, wood fuels) without taking the hit by using inefficient humans to convert that material into energy.

I’m taking this aside, because if you’re only using dead humans to feed live humans, you run out of humans.   To keep the population level, each human would only be able to eat one human in its lifetime.   Well, let’s call that 100 pounds of meat.   Even on a starvation diet, you go through that pretty quickly.

So either the whole thing is ridiculous, or the machines have a better energy source.

There is a phrase about “a form of fusion” that is probably a science patch.   Someone made the same objections I’m making and simply suggested adding an energy source so it wouldn’t be a closed system.   But if there’s enough fusion to grow food for the humans, there’s more energy available just using the fusion directly rather than using the humans.

And humans as batteries?   We don’t store much energy.   We release heat all the time, and then it’s gone.   At best our bodies are fuel in a pinch, but the dead get fed to the living…

Anyway, cool movie, dumb idea.   A decent writer could come up with a more interesting and reasonable justification, but I’m sure someone was wedded to the idea of an easy-to-grasp image: Morpheus holding up a battery.   Or maybe it was product placement.

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