The artists with their sculpture, Tree of Knowledge. The artists used pyrography to burn over 160 historical questions that underlie our collective pursuit of knowledge into a 10,000-pound, salvaged Eucalyptus tree section. Questions include: “Do we have free will?” “Is there a grand unified theory of physics?” “Can machines be truly intelligent?”  (Photo by Stefanie Schwartz.)

Ancient Wisdom for a Future Ecology: Trees, Time, and Technology