Fake news spread six times faster in social media than true stories. As technologists, our industry has built the tools that enable the spread of disinformation across social, the web, and beyond. But fake news is nothing new, it has been a part of each advancement in the technology that powers the spread of information, from the printing press to blogging. What makes fake news so appealing? Is it a tech problem or a human problem? In this talk, I will explain the psychology that makes fake news appealing to our brain, and what technology can learn about this psychology to build better tools.