This paper seeks to identify the factors which have the greatest effect on gas diffusion rates into animal burrows, and in turn on the maximum size of burrowing animals which may rely on simple burrow ...

Dorit Hockman is in the Department of Human Biology, Division of Cell Biology, University of Cape Town, Cape Town 7925, South Africa. This theory needs to be tested, but, without travelling back in ...

Your lungs are vital for providing your body with fresh oxygen while ridding it of carbon dioxide. This process is called gas exchange. In some individuals, such as those with chronic obstructive ...