Because now giant sequoias are starting to die where they stand. And it’s been my job to document it. Last summer, our park botanist requested a photo log of declining sequoia health. So each week when I was out in the field, I took pictures of several groups of dying sequoias, snapping photos from the same GPS point each time. Then I carefully labeled each photo with the date and location and dropped it into a folder on the park’s internal network. These photos won’t do anything to save the trees. But it seems important, somehow, to provide our grandchildren with some kind of record of the time we realized we might be losing the largest trees on Earth.