Learn how ancient oxygen levels in the Paleozoic era were linked to giant insect size, and why that theory is now being ...
Fossil relatives of dragonflies, known as griffinflies, had wingspans of 70 centimeters (28 inches) 300 million years ago, and they weren’t the era’s only insects that far exceeded their modern ...
Three-hundred-million years ago, Earth was very different. The continents had coalesced into Pangea, which was dominated in its equatorial regions by vast coal-swamp forests. With high atmospheric ...
Millions of years ago, oversized insects such as griffinflies boasting wingspans comparable to today's hawks scuttled across (and fluttered above) the planet. But why these jumbo jets of the insect ...