Oxygen, that thing we all need to breathe…

OxygenWe all do it subconsciously. Breathe in… Breathe out… We probably only really notice we are doing it when we get to the top of a flight of stairs, or when we go up in altitude and realize that the oxygen availability has changed, but we all know that oxygen is critical to life. Continue reading “Oxygen, that thing we all need to breathe…”

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