It's summer 2019, and the planet’s far North is on fire. Smoke from millions of acres of burned forest drifts over communities across Alaska, Canada, and Siberia. Fires in these places are normal, but—as studies here at the University of Alaska show—they are also abnormal. Full story 

Photo: Smoke from wildfires in Siberia drifts east toward Canada and the U.S. on July 30, 2019. (NASA)