Every Tuesday we show 3 TED Talks on our wall sized screen organized around a common theme.

This weeks theme: The Mind

Gero Miesenboeck reengineers a brain In the quest to map the brain, many scientists have attempted the incredibly daunting task of recording the activity of each neuron. Gero Miesenboeck works backward -- manipulating specific neurons to figure out exactly what they do, through a series of stunning experiments that reengineer the way fruit flies perceive light.

Dan Gilbert asks, Why are we happy? Harvard psychologist Dan Gilbert says our beliefs about what will make us happy are often wrong -- a premise he supports with intriguing research, and explains in his accessible and unexpectedly engaging talk.

VS Ramachandran on your mind Vilayanur Ramachandran tells us what brain damage can reveal about the connection between celebral tissue and the mind, using three startling delusions as examples.