SPEEDSim: Spatial Population Dynamics Simulator

This app has been updated by Apple to display the Apple Watch app icon. * Added a model of internet worms, which spread through networks using biologically inspired dispersal strategies. In the model, the colors show the prevalence of non-immune computer hosts in a given portion of the internet; the brightness shows the infection level there. * Added description of Museum Mode to the "Using this app" info under the Lessons tab. Museum mode is intended for use on an iPad running in a kiosk in a public space. Some users have requested the addition of text input for parameters. It is on the to-do list! Family and work obligations preclude rapid work on the app, but this feature is fairly high on the list of desired additions.