New advanced techniques are changing the game. Optogenetics is a technique that occurs when a protein sensitive to light is "inserted into neurons, which can then be turned on and off with a blue laser." This, combined with advanced imaging, is giving neuroscientists a comprehensive understanding of how memories form. Could this be the advancement of a dystopian-type future or a powerful tool when it comes to healing traumatic experiences? Joshua Sariñana, a neuroscientist and writer, explores.