Meganeura is an extinct genus of giant dragonflies that lived during the Carboniferous period, approximately 300 million years ago. These prehistoric insects are notable for their impressive wingspan, reaching lengths of up to 75 centimeters (about 30 inches), making them some of the largest flying insects to have ever existed. Their size is attributed to the high oxygen levels present in the atmosphere during the Carboniferous, which supported larger body sizes in terrestrial and aerial organisms.
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