While bounding along a wooded trail in Groton one brisk morning last week, a group of energetic second-graders approached a sheer rock wall covered with moss and lichen that glowed in bright sunshine.
"At the same time, it has dense fibers, and a seamless texture, and layers as delicate as paper, which makes it an ideal material for art," Li says, adding that the bark is also waterproof as a result ...
While bounding along a wooded trail in Groton one brisk morning last week, a group of energetic second-graders approached a sheer rock wall covered with moss and lichen that glowed in bright ...