Ashes to Ashes (Av jord är du kommen) is a mixed reality walking experience set in cemeteries that explores time, distance, presence, mortality, and humanity's relationship with the Earth. Guided by Theia—the ancient planet believed to have collided with Earth and contributed to the formation of the Moon—participants use their mobile phones to experience digital layers that connect the microcosm of human bodies and technology with the vastness of geological time. Combining cutting-edge mixed reality technology, sound, performance, and storytelling, the work reflects on cycles of matter, interconnectedness, and what humans leave behind.