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

Insects first took to the skies about 350 million years ago, some 200 million years before birds first flapped their wings. By the end of the Carboniferous period, 300 million years ago, some flying ...

Three-hundred-million years ago, Earth was very different. The continents had coalesced into Pangea, which was dominated in ...

Three hundred million years ago, dragonfly-like creatures with wingspans stretching 70 centimeters patrolled the skies of a world nothing like our own. These griffinflies, as paleontologists call ...

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

Learn how ancient oxygen levels in the Paleozoic era were linked to giant insect size, and why that theory is now being ...

We ignore most insects that cross our path. We swat away flies, marvel at butterflies, and dash away from angry wasps. But one insect that has been around for about 300 million years is one of ...

"I'm an aquatic entomologist, and dragonflies and damselflies are the most colorful and noticeable insects in the habitats in which I work," says Dr. Celeste A. Searles Mazzacano, a staff scientist ...

The globe skimmer dragonfly (Pantala flavescens) measures just 1 1/2 inches but can fly nonstop across oceans, according to research study published in the journal PLoS ONE. The pinkie-size dragonfly ...