This animation shows the flow of red cells in the bloodstream around an alveolus, and the exchange of gases.
This shows how p waves are refracted as they pass through the earth, and how the shadow region is created.
I've stopped making GIF animations, since it's a slow and cumbersome process compared to flash authoring, and the files are much larger.
You cannot make GIF animations interactive.
However, some of the ones I produced are still very useful, if you like these and would like some more, contact me using the form on the contact page on the central website.
