A brown bear in a Siberian boreal forest. Logan Berner November 3, 2023 The world’s boreal forests may be shrinking as climate change pushes them northward Ronny Rotbarth, Wageningen University; David J. Cooper, Colorado State University; Logan Berner, Northern Arizona University, and Roman Dial, Alaska Pacific University How will Earth’s vast boreal forests look in a warmer world? Combining satellite-based research with fieldwork shows that the planet’s largest wilderness may be changing in unexpected ways.