If you've ever been on a flight, you've heard about the oxygen masks that may drop down, but did you know they only have a few minutes worth of air? Here's why.

Oxygen masks were deployed on an Air New Zealand flight from Los Angeles to Auckland as it descended 7,000 feet to avoid turbulence in what turned out to be a false emergency , the New Zealand ...

If you've ever been on a flight, you've heard about the oxygen masks that may drop down, but did you know they only have a few minutes worth of air? Here's why.