Nearly 40 people responded to our challenge this month, in which we asked participants to identify a situation where it was important to convey uncertainty, and then design a visualization that made that uncertainty clear to the audience. Alberto Cairo, who addresses uncertainty in his upcoming book “How Charts Lie,” provided his thoughts on the challenge, and contributed signed copies of his book for three lucky participants. Our community took a variety of different approaches to the challenge, which makes this month’s gallery an excellent collection of ideas on how to represent uncertainty in different situations.