"Research shows in the short term our own concepts of aggression are activated in the brain when we watch these shows, and we are primed to behave aggressively, " said psychologist Sarah Coyne.

CNN: Our unhealthy love of reality TV bullying

Eventually, we aspire to move into our own space, in the footsteps of Marbles: The Brain Store, who began inside the same walls as Lab42.

FORBES: Starting Up At the Foundry: Perks And Tradeoffs

Some of these chemicals are already in all our brains, cannabis smokers or not, as the brain has its own endocannabinoid system.

BBC: How could cannabis alter the teenage brain?

This exquisite malleability ensures that our unique, personal experiences provide us with a customized brain with its own highly individualized sets of circuits, switches and connections.

CNN: Make your 'rainy brain' sunnier

The idea of controlling brain cells with light "captured our imagination, " recalls Boyden, who now runs his own lab at MIT.

FORBES: Magazine Article