The crews took carefully annotated, high-resolution photographs everywhere they went — 120,000 of them, now the largest such archive in the world. "There's this huge, huge reserve," Trant said. An astonishing trove of century-old photographs of the Rocky Mountains show the treeline is shifting. These old images are really this window into what these landscapes looked like under Indigenous care. We still think that climate is a really important driver of all this change."

Source: CBC News July 09, 2020 18:00 UTC