TARDIS Index File


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Helium was a light element found on Earth. It was a gas at room temperature.

When humans inhaled large quantities of helium, their voices became high-pitched. The Fourth Doctor was able to utilise his respiratory bypass system to avoid its effects. (TV: The Robots of Death)

Helium 2 had the potential to exist during the Leptonic Era. (TV: Time and the Rani)

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