In October 2012, when Hurricane Sandy raged up the East Coast of the United States, many people in the path of the storm turned to a relatively new communication channel: Twitter. Between October 27th and November 1st, as the storm hit New York City and surrounding states, more than 20 million Tweets about the storm [...]

Obesity is a rapidly growing epidemic in the US. More than a third of American adults are obese, and another third are overweight. If this trend holds, 42% of American adults will be obese by 2030, making obesity one of the leading public health challenges of our times. Excessive weight is bad for people’s health, [...]