VAST Challenge 2017: Last Call for Participation Submission deadline is July 16, 2017 at 11:59 pm Pacific Daylight Time (UTC/GMT -9 hours). http://vacommunity.org/VAST+Challenge+2017 There is still time to submit to the Visual Analytics Science and Technology (VAST) Challenge--an annual contest with the goal of advancing the field of visual analytics through competition. The VAST Challenge is designed to help researchers understand how their software would be used in a novel analytic task and determine if their data transformations, visualizations, and interactions would be beneficial for particular analytic tasks. VAST Challenge problems provide researchers with realistic data sets and questions for evaluating their software, as well as an opportunity to advance the field by solving complex problems. This year's Challenge offers three diverse mini-challenges and a grand challenge that concern a sad state of affairs in a nature preserve, threats to flora and fauna, and the quest of a local graduate student to find the explanations. We welcome visualization innovations that address key issues in the problems presented; even if a mini-challenge is not completely solved. Submission deadline is July 16, 2017 at 11:59 pm Pacific Daylight Time (UTC/GMT -9 hours). Questions? Email: vast-challenge@ieeevis.org<mailto:vast-challenge@ieeevis.org>