One February morning in 2024, researchers watching a group chat witnessed a saguaro cactus suddenly topple. That fall was not mysterious in the sense of surprise; for six months lidar scanners had been recording the cactus and its surroundings day by day, producing a finely detailed record of its life and collapse.
The scans were collected for Framerate: Desert Pulse, an art and data project commissioned by the Desert Botanical Garden in Phoenix and produced with ScanLAB Projects, a London studio. The installation pairs dense 3D scans of Tucson-area desert plots including saguaros, prickly pear, ocotillo and cholla with immersive video projections and a sonically rich score by composer Pascal Wyse, who incorporated found desert materials such as saguaro spines. Outdoors, giant screens loop the changing desert imagery among living plants; inside, a separate room surrounds visitors with screens on walls, floor and ceiling.
ScanLAB technicians fired millions of laser pulses into garden beds every day for a year. Each reflected pulse helped build highly accurate 3D models, yielding billions of points of what the team calls digital dust. Because the scans were repeated so frequently, they captured minute, day-to-day shifts: cacti swelling and shrinking as they took up water, arms stretching skyward, sand and pebbles moved by people and animals, cholla pads clinging, weeds sprouting and dying, branches trembling in the wind. The project also logged human-built features encroaching on desert landscapes, from housing developments and farms to a Target parking lot and a landfill, images that the artists hope will prompt reflection on sustainability.
Project leaders describe the work as both celebration and caution. The saguaro footage, for instance, shows a towering organism that had been giving life to the surrounding ecosystem even as it deteriorated. Team members said the moment the cactus fell felt simultaneously exciting, because of the rare documentation, and sorrowful, because of the loss itself.
Beyond its artistic aims, the dataset is a rich scientific resource. Collecting similarly frequent, precise measurements in the field would be difficult and costly, so the continuous lidar record provides a rare view of growth and change. Garden researchers have already noticed unexpected behaviors. Agaves, for example, were seen repeatedly folding and unfolding their rosettes over the course of days, a rhythm researchers had not anticipated. That observation raises testable questions about adaptive functions, such as whether the movements help protect plants against heat stress.
Lidar records more than shape. Variations in laser reflections can reveal subtle properties like moisture content beneath a cactus skin, a potential clue to why some saguaros collapse while others remain standing. After the saguaro fell, the scanners continued to monitor the carcass for six months as it nourished wildlife and slowly reintegrated into the desert floor. That continuous decomposition timeline could help scientists understand nutrient cycling and inform strategies to protect other large plants.
Parsing the enormous trove of digital dust will be a long task, but the possible applications are broad. Researchers can quantify growth rates, chart phenology such as bloom timing, track microtopographic changes, and observe how animals use particular structures. Those insights could inform conservation priorities, identifying areas that warrant protection and clarifying how species respond to extreme heat, drought and other stressors.
There is precedent for converting art-driven lidar projects into scientific knowledge. Work by ScanLAB contributed to a peer-reviewed study on coastal erosion in England, providing data that helped plan protections for infrastructure. Framerate: Desert Pulse aims to bridge the same divide between art and science, using an emotionally engaging installation to draw public attention while producing a rigorous record for study.
The Desert Botanical Garden and the project team hope the installation sparks curiosity about the complex life of the Sonoran Desert and about human impacts on it. At the same time, scientists and technicians have begun converting the digital dust into actionable conservation knowledge. The result is a rare example of how immersive art can create both empathy and evidence, documenting life and loss in a landscape under pressure.