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Wednesday, 18 February 2015

Is Pure Oxygen Better Than Air?

Most of us know that humans and other animals need Oxygen, and without it we rapidly die. But have you ever wondered why the Oxygen masks on planes seem to be flat pancakes rather than huge Oxygen filled balloons? or that masks for people on Oxygen appear to have holes in them or don't fit tightly or are two loose tubes up the nose? The truth of the matter is that although we need Oxygen at sea level at around 20% to be fully conscious (well most of the time) or sick people may be given more (because they aren't absorbing enough).  You may think that if Oxygen is good for us then more must be better..  but this is not necessarily the case.

If you have a spare 10 mins this is an excellent weird read.