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One misconception about aging beers is the claim that CO<sub>2</sub> is heavier than air and forms a blanket that protects the beer from oxygen. This is not true unless CO<sub>2</sub> is constantly being produced from the beer. The [https://en.wikipedia.org/wiki/Ideal_gas_law Ideal Gas Law] states that unlike solids or liquids of different densities, the gasses will eventually mix. See [http://beerandwinejournal.com/can-co2-form-a-blanket/ Dr. Chris Colby's explanation of this on Beer and Wine Journal.], and this [https://www.youtube.com/watch?v=_oLPBnhOCjM science documentary demonstration of how gasses eventually mix] (note that the molecular weight of bromine used in the video is 160 g/mol and the weight of CO<sub>2</sub> is 44.01 g/mol, so CO<sub>2</sub> would diffuse into air faster than bromine <ref>[https://pubchem.ncbi.nlm.nih.gov/compound/Dibromine Bromine. PubChem. Retrieved 1/1/2016.]</ref><ref>[https://pubchem.ncbi.nlm.nih.gov/compound/280 Carbon Dioxide. PubChem. Retrieved 1/1/2017.]</ref>).
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