When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains in this movie remix.
Last week in Tampa, Florida, the United States Geospatial Intelligence Foundation (USGIF) convened the postponed 2013 GEOINT Symposium. The event drew close to 5000 attendees and over 270 exhibitors. Directions Magazine offers a recap of the event through numerous reports.