Oxygen supply through the tracheolar–muscle system does not constrain insect gigantism - Nature

Oxygen supply through the tracheolar–muscle system does not constrain insect gigantism  NatureGiant dragonflies once roamed Earth’s skies. New research upends the textbook theory of why they went extinct  The Conversation300 Million Years Ago, Insects Were Enormous. That Stopped – And We’re Probably Wrong About Why  IFLScienceMassive insect body size 300 million years ago may not have been due to high atmospheric oxygen  Phys.orgOxygen supply of mammals versus insects (IMAGE)  EurekAlert!