Explanation for why we don’t see two-foot-long dragonflies anymore fails

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

Earth's first insects were massive, some having wingspans over two feet long, and scientists aren't sure why

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

Massive insect body size 300 million years ago may not have been due to high atmospheric oxygen

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

Giant Dragonflies With 2-Foot Wingspans Ruled the Skies 300 Million Years Ago — But Oxygen May Not Explain Why

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

USACE installing oxygen diffusion system to boost hydropower efficiency at Wolf Creek Dam

JAMESTOWN, Ky. – The U.S. Army Corps of Engineers Nashville District is taking a major step toward enhancing hydropower generation and protecting water quality with the installation of an oxygen ...
EurekAlert!

Muscle oxygen-binding proteins circumvent anatomical limits to enhance oxygen diffusion in multicellular organisms

Funding: W.C.R. acknowledges support from the NIH (grant no. 5R35GM138030) and NSF (CAREER Grant no. 1845363), A.J.B. acknowledges support from the Human Frontiers Science Program grant (RGY0080/2020) ...