https://cafemom.com/news/inhaling-helium-balloons-asphyxiation-mom-dies-childs-birthday
Mom of 2 Dies From Asphyxiation After Inhaling Helium for Balloons
Feb 5, 2025 - A young New Zealand mom of two died after inhaling helium from balloons for her daughter's first birthday party.
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https://www.sciencefocus.com/science/why-does-inhaling-helium-change-your-voice
Why does inhaling helium change your voice? - BBC Science Focus Magazine
Jul 12, 2023 - Helium is not the only gas to change the sound of your voice.
bbc science focusinhaling heliumyour voicechange