The secret to making a story go viral

Readers prefer to share stories that are positive and exciting, Maria Konnikova writes of a Penn marketing study: "When the researchers manipulated the framing of a story to be either negative (a person is injured) or positive (an injured person is 'trying to be better again'), they found that the positive framing made a piece far more popular." Also, fighting click-bait with software, and viral titles for famous books.