Imagine a world where dragonflies with wingspans rivaling that of a hawk darted through ancient forests, and millipedes as ...

But insects like dragonflies don’t have lungs. Instead, they have a network of breathing tubes called tracheae that run throughout their bodies. These breathing tubes, composed of chitin, start at ...

PTERYGOTE insects originally evolved as terrestrial animals, but various families of Hemiptera have since colonized aquatic habitats. Corixids live on the bottom, feeding mainly on algae and detritus.