Their research helps explain why the «great oxidation event», which introduced oxygen into the atmosphere around 2.4 billion years ago, did not generate modern levels of oxygen. (sciencedaily.com)
Of course, the historical methane emissions were still small in comparison with modern levels. (livescience.com)
Furthermore, a leather jacket like this can take a skirt or dress to a much more modern level. (nofearoffashion.com)