It was originally proposed (Harlé & Harlé, 1911) that Meganeura was able to fly only because the atmosphere at that time contained more oxygen than the present 20%.
Propúxose inicialmente (Harlé & Harlé, 1911) que Meganeura podía facer o esforzo de voar porque a atmosfera naquel tempo contiña máis oxíxeno que o 20% da actual atmosfera.