A concise masterclass in how basic physics can be the difference between life and death. It proves that understanding invisible hazards is far more valuable than any expensive survival gadget.
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How Can Air Kill You That Easily ???追加:
This is why igniting a flame before entering a [music] cave can save your life. And if you thought it was just so you could see in the dark, you'd be totally wrong because the flame can expose [music] something your eyes never could. As you keep it near the top, everything seems normal, but the moment [music] you move it closer to the ground, the flame instantly extinguishes. This is caused by carbon dioxide [music] being denser than oxygen, so it sinks and silently gathers at the bottom. And if there isn't enough oxygen to keep a flame alive, there isn't [music] enough to keep you alive, either.
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