Scientists rethink why giant insects once ruled the skies, finding oxygen may not explain their size or disappearance.

So when bugs seem to arrive all at once, it’s really a chain reaction: warming temperatures, melting snow, spring rain, and ...

Eleanor has an undergraduate degree in zoology from the University of Reading and a master’s in wildlife documentary production from the University of Salford. Eleanor has an undergraduate degree in ...

The problem with diffusion is that it’s notoriously slow. The oxygen constraint hypothesis argued that the larger the insect ...

Scientific consensus is that high oxygen levels allowed these humongous fliers to exist, but a new study throws that idea ...