[caption id="attachment_121067" align="alignleft" width="150"] "You can walk between the blood vessels," said University of Illinois College of Medicine neurosurgeon Ali Alaraj.[/caption]

Take a walk through a human brain? Fly over the surface of Mars? Computer scientists at the University of Illinois at Chicago are pushing science fiction closer to reality with a wraparound virtual world where a researcher wearing 3D glasses can do all that and more.

In the system, known as CAVE2, an 8-foot-high screen encircles the viewer 320 degrees. A panorama of images springs from 72 stereoscopic liquid crystal display...

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