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Science vs

Fire Force

While the show is squishy about how fire powers work, and it tends to relate these abilities to any phenomenon tangentially related to heat (even though many of them have nothing to do with combustion), the most egregious (so far!) is Iron’s “Martensite” ability, which allows him to transform the iron in his body into a harder form, making him nearly invulnerable.

Martensite is harder than “regular” iron, and it is forged as described in the show, but in reality, there are only about 4 g of iron in the average human body. That’s less than the weight of a nickel. Not nearly enough to make your entire body bulletproof.

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