Researchers have wondered how an alligator-size arthropod lived more than 300 million years ago. The discovery of an intact ...

THE insects which constitute the Linnæan genus Podura, though small and apparently insignificant, present many interesting peculiarities of structure, and still more interesting characters ...

While this is one of the longest-living dog breeds, it can have some of the same health issues as other toy breeds, such as knee problems and collapsing tracheae. Start toothbrush training early ...

Oxygen is admitted directly by little breathing holes in their shells which form tracheae to distribute oxygen throughout the body. While they have no need for a heart, wasps have tiny waists and ...

Insects don’t have a circulatory system to transport oxygen, instead, it gets delivered directly to their tissues through a network of tiny tubes called the tracheae. The more oxygen in the ...