Investigate scientists' use of models to understand more about an object, concept or relationship. Explore the difference between a healthy eye and an eye affected by macular degeneration by building two models.

An interesting application of wearable computing that is helping blind people "see". vOICe technology uses synthetic (bionic) vision through auditory video representations, combined with current brain implant and retinal implant...

This article on the history and development of the artificial heart examines past attempts at artificial heart transplant and looks at future research and development.