IN NATURE (vol. xvii. p. 284) is a notice of a work by Dr. Palmen, of Helsingfors, on the morphology of the tracheal system. From the wording of the notice it appears as if the views of Dr. Palmen as ...

Harvestmen (Arachnida: Opiliones) are a common and widespread group, the most familiar of which are recognizable by their small, rounded bodies and long, slender legs ('daddy long-legs'). Their fossil ...

Giant insects might crawl on Earth or fly above it if there was just more oxygen in the air, scientists report. Roughly 300 million years ago, giant insects scuttled around and fluttered over the ...

Honorable mention: Tracheae of a silkworm. Your browser is out of date. Please update your browser at http://update.microsoft.com ...