Ключевые слова: annual rings, archaeology, art, bark, blue sky, botany, building materials, cellulose, chronology, construction material, cracks, dating, dendrochronology, dendroecology, energy, fiber, flora, geoscience, green meadow, growth, juice, pile of wood, raw, resin, rings, root, root pile, science, structure, surface, teaching, texture, time, tree, tree age, tree bark, tree clusters, tree resin, tree sap, trees,