Editing Extinction event (section)

====Geomagnetic reversal====
One theory is that periods of increased [[geomagnetic reversal]]s will weaken [[Earth's magnetic field]] long enough to expose the atmosphere to the [[solar wind]]s, causing oxygen ions to escape the atmosphere in a rate increased by 3–4 orders, resulting in a disastrous decrease in oxygen.<ref>{{cite journal|title=Oxygen escape from the Earth during geomagnetic reversals: Implications to mass extinction | vauthors = Wei Y, Pu Z, Zong Q, Wan W, Ren Z, Fraenz M, Dubinin E, Tian F, Shi Q, Fu S, Hong M | display-authors = 6 |date=1 May 2014|journal=Earth and Planetary Science Letters|volume=394|pages=94–98|via=NASA ADS |doi=10.1016/j.epsl.2014.03.018 |bibcode=2014E&PSL.394...94W|doi-access=free}}</ref>