Jeff Wallner, a park guide at Saguaro National Park East, has been observing the human and natural cycles at the park, the most celebrated and studied cactus area in the world, for 20 years. He notes that over the years
Jeff Wallner, a park guide at Saguaro National Park East, has been observing the human and natural cycles at the park, the most celebrated and studied cactus area in the world, for 20 years. He notes that over the years